At Cotswold Koi we have a wide range of Bottom Drains. From Economy drains to aerated drains. We understand that sometimes it can be confusing as to knowing what equipment you require to install a bottom drain, So we have put together this kit which will make your life a 100% easier.

110mm Economy Bottom Drain Kit
110mm Economy Bottom Drain Kit
At Cotswold koi We understand that sometimes it can be confusing as to knowing what equipment you require to install a bottom drain, So we have put together this kit which will make your life a 100% easier. We find most filter bays are within a 3,6 or 9 meter distance from the bottom drain location so we have grouped together all the products that you require to install a bottom drain effectively without the headache. You can choose from either 1, 2 or 3 lengths of the required pipework to enable you to achieve most drainage Requirements. Should any further pipe work or fittings be required they can also be added via the pipework section on the website. Read more
3mtr 110mm Economy Bottom Drain Kit
- 1x 110mm Economy Bottom Drain – PW634
- 1x 3mtr 110mm Pipe – PW617
- 1x 110mm Black Waste 90 degree bend – PW623
6mtr 110mm Economy Bottom Drain Kit
- 1x 110mm Economy Bottom Drain – PW634
- 1x 110mm Black Waste Straight connector PW622
- 2x 3mtr 110mm Pipe – PW617
- 1x 110mm Black Waste 90 degree bend – PW623
9mtr 110mm Economy Bottom Drain Kit
- 1x 110mm Economy Bottom Drain – PW634
- 2x 110mm Black Waste Straight connector PW622
- 3x 3mtr 110mm Pipe – PW617
- 1x 110mm Black Waste 90 degree bend – PW623
£59.82 – £131.68Price range: £59.82 through £131.68 inc. VAT Select options This product has multiple variants. The options may be chosen on the product page

110mm Economy Bottom Drain With Pressure Pipe Kit
110mm Economy Bottom Drain With Pressure Pipe Kit
At Cotswold koi We understand that sometimes it can be confusing as to knowing what equipment you require to install a bottom drain, So we have put together this kit which will make your life a 100% easier. We find most filter bays are within a 3,6 or 9 meter distance from the bottom drain location so we have grouped together all the products that you require to install a bottom drain effectively without the headache. You can choose from either 1, 2 or 3 lengths of the required pipework to enable you to achieve most drainage Requirements. Should any further pipe work or fittings be required they can also be added via the pipework section on the website. Read more
3mtr 110mm Economy Bottom Drain With Pressure Pipe Kit
- 1x 110mm Economy Bottom Drain – PW634
- 1x 4 Inch Socket To 110mm Plain Male Converter PW621
- 1x 3m PVC Imperial Pressure Pipe – 4″ PW7078
- 1x PVC Imperial Pressure Pipe Swept Bend PW6745
6mtr 110mm Economy Bottom Drain With Pressure Pipe Kit
- 1x 110mm Economy Bottom Drain – PW634
- 1x 4 Inch Socket To 110mm Plain Male Converter PW621
- 2x 3m PVC Imperial Pressure Pipe – 4″ PW7078
- 1x PVC Imperial Pressure Pipe Swept Bend PW6745
- 1x PVC Imperial Pressure Pipe Straight Joiner PW7081
9mtr 110mm Economy Bottom Drain With Pressure Pipe Kit
- 1x 110mm Economy Bottom Drain – PW634
- 1x 4 Inch Socket To 110mm Plain Male Converter PW621
- 3x 3m PVC Imperial Pressure Pipe – 4″ PW7078
- 1x PVC Imperial Pressure Pipe Swept Bend PW6745
- 2x PVC Imperial Pressure Pipe Straight Joiner PW7081
£132.17 – £264.31Price range: £132.17 through £264.31 inc. VAT Select options This product has multiple variants. The options may be chosen on the product page

4 Inch Socket To 110mm Plain Male Converter
4 Inch Socket To 110mm Plain Male Converter
The 4 Inch Socket To 110mm Plain Male Converter is designed to fit inside a bottom drain to convert the standard 4″ opening to 110mm.
At Cotswold Koi we understand The importance of pipe work, mistakes made in pipework are one of the most common we come across and can be very costly and hard to change at a later date. We are happy to provide assistance, should you need it, please Contact Us if you need assistance in choosing the right pipe work for your project. Read more
There are three main types of pipe work used on koi ponds:
- Metric Pressure Pipe
- Imperial Pressure Pipe
- Black waste pipe

4″ Aquadrift Aerated Bottom Drain Kit
4″ Aquadrift Aerated Bottom Drain Kit
At Cotswold koi We understand that sometimes it can be confusing as to knowing what equipment you require to install a bottom drain, So we have put together this kit which will make your life a 100% easier. We find most filter bays are within a 3,6 or 9 meter distance from the bottom drain location so we have grouped together all the products that you require to install a bottom drain effectively without the headache. You can choose from either 1, 2 or 3 lengths of the required pipework to enable you to achieve most drainage Requirements. Should any further pipe work or fittings be required they can also be added via the pipework section on the website. Read more
3 mtr Aquadrift Aerated Bottom Drain Kit Includes :
- 1 x 4″ Aerated Bottom drain and Lid
- 1 x 3mtr 4″ pressure pipe – PW7078
- 1 x 3mtr 1″ pressure pipe – PW7601
- 1 x 4″ 90 degree pressure swept bend – PW7645
- 1 x 1″ 90 degree pressure bend – PW7088 (07139)
6 mtr Aquadrift Aerated Bottom Drain Kit Includes :
- 1 x 4″ Aerated Bottom drain and Lid
- 2 x 3mtr 4″ pressure pipe – PW7078
- 2 x 3mtr 1″ pressure pipe – PW7601
- 1 x 4″ 90 degree pressure swept bend – PW7645
- 1 x 1″ 90 degree pressure bend – PW7088 (07139)
- 1 x 4″ Straight joiner – PW7081 (07190)
- 1 x 1″ Straight joiner – PW7603 (07184)
9 mtr Aquadrift Aerated Bottom Drain Kit Includes :
- 1 x 4″ Aerated Bottom drain and Lid
- 3 x 3mtr 4″ pressure pipe – PW7078
- 3 x 3mtr 1″ pressure pipe – PW7601
- 1 x 4″ 90 degree pressure swept bend – PW7645
- 1 x 1″ 90 degree pressure bend – PW7088 (07139)
- 2 x 4″ Straight joiner – PW7081 (07190)
- 2 x 1″ Straight joiner – PW7603 (07184)
£286.19 – £428.39Price range: £286.19 through £428.39 inc. VAT Select options This product has multiple variants. The options may be chosen on the product page

4″ SpinDrifter Aerated Bottom Drain Kit
4″ SpinDrifter Aerated Bottom Drain Kit
At Cotswold koi We understand that sometimes it can be confusing as to knowing what equipment you require to install a bottom drain, So we have put together this kit which will make your life a 100% easier. We find most filter bays are within a 3,6 or 9 meter distance from the bottom drain location so we have grouped together all the products that you require to install a bottom drain effectively without the headache. You can choose from either 1, 2 or 3 lengths of the required pipework to enable you to achieve most drainage Requirements. Should any further pipe work or fittings be required they can also be added via the pipework section on the website. Read more
3 mtr SpinDrifter Aerated Bottom Drain Kit Includes :
- 1 x 4″ Aerated Bottom drain and Lid Includes direct air feed kit – AP4451
- 1 x 3mtr 4″ pressure pipe – PW7078
- 1 x 3mtr 1″ pressure pipe – PW7601
- 1 x 4″ 90 degree pressure swept bend – PW7645
- 1 x 1″ 90 degree pressure bend – PW7088 (07139)
6 mtr SpinDrifter Aerated Bottom Drain Kit Includes :
- 1 x 4″ Aerated Bottom drain and Lid Includes direct air feed kit – AP4451
- 2 x 3mtr 4″ pressure pipe – PW7078
- 2 x 3mtr 1″ pressure pipe – PW7601
- 1 x 4″ 90 degree pressure swept bend – PW7645
- 1 x 1″ 90 degree pressure bend – PW7088 (07139)
- 1 x 4″ Straight joiner – PW7081 (07190)
- 1 x 1″ Straight joiner – PW7603 (07184)
9 mtr SpinDrifter Aerated Bottom Drain Kit Includes :
- 1 x 4″ Aerated Bottom drain and Lid Includes direct air feed kit – AP4451
- 3 x 3mtr 4″ pressure pipe – PW7078
- 3 x 3mtr 1″ pressure pipe – PW7601
- 1 x 4″ 90 degree pressure swept bend – PW7645
- 1 x 1″ 90 degree pressure bend – PW7088 (07139)
- 2 x 4″ Straight joiner – PW7081 (07190)
- 2 x 1″ Straight joiner – PW7603 (07184)
If it’s for a liner installation then a flange kit is required and can be added to your basket separately .
https://youtu.be/-ZGL-HGBnXI
£407.35 – £562.85Price range: £407.35 through £562.85 inc. VAT Select options This product has multiple variants. The options may be chosen on the product page

4″ SpinDrifter Aerated Bottom Drain to 3″ Pipework Kit
4″ SpinDrifter Aerated Bottom Drain to 3″ Pipework Kit
At Cotswold koi We understand that sometimes it can be confusing as to knowing what equipment you require to install a bottom drain, So we have put together this kit which will make your life a 100% easier. We find most filter bays are within a 3,6 or 9 meter distance from the bottom drain location so we have grouped together all the products that you require to install a bottom drain effectively without the headache. You can choose from either 1, 2 or 3 lengths of the required pipework to enable you to achieve most drainage Requirements. Should any further pipe work or fittings be required they can also be added via the pipework section on the website. Read more
4″ SpinDrifter Aerated Bottom Drain to 3″ Pipework Kit:
- 1 x 4″ Aerated Bottom drain and Lid Includes Direct Air Feed Kit – AP4451
- 1x 4″- 3″ Reducer – PW7094
- 1 x 3mtr 3″ pressure pipe – PW7071
- 1 x 3mtr 1″ pressure pipe – PW7601
- 1 x 3″ 90 degree pressure swept bend – PW7644
- 1 x 1″ 90 degree pressure bend – PW7088 (07139)
You can build the kit to suit your project

Aquadrift 4″ Bottom Drain
Aquadrift 4″ Bottom Drain
The Aquadrift 4″ Bottom Drain is perfect for all gravity fed installations. Precision machine cut to the highest standard, a bottom drain you can rely on. 1″ separate pressure pipe air connection allows air to enter the drain independently from the water pipe outlet. The membrane and backing plate on the Aquadrift bottom drain fits into a recess in the specially manufactured rubber dome. The recess in the Aquadrift bottom drain prevents the membrane from becoming detached. The complete assembly is secured to the Aquadrift bottom drain by means of a threaded stem, which also provides the air inlet. Read more
- Suitable for 4″ or 110mm pipework. Can be used with standard waste pipe with suitable connectors.
- Recommended maximum air pressure 120ltrs
- Can be used with no air hose to the unit, simply use the appropriate connector after your air pump

Aquadrift Bottom Drain Air Kit
Aquadrift Bottom Drain Air Kit
The Aquadrift Bottom Drain Air Kit Is to connect the 1″ pressure pipe from the bottom drain to 19mm flexi hose that can be put to an air pump. Read more

Aquadrift Liner Flange Kit
Aquadrift Liner Flange Kit
The Aquadrift Liner Flange Kit fits the Aquadrift 4″ bottom drain and allows you to use it with a liner. This Liner flange kit comes with stainless steel screws and its pre drilled with countersunk holes. Read more

Economy Bottom Drains With Ring Aerator
Economy Bottom Drains With Ring Aerator
These Economy Bottom Drains With Ring Aerator are well made and are suited for use with 110mm or 50mm waste pipe. The dome is removable with a large integral surface mounted air ring diffuser around the outer edge. Not only does the aeration benefit your pond and your fish but it also helps with pulling debris into your sump making it more effective. The aerator is fitted with an air input tee that will accept flexible airline with an internal diameter (ID) of 4mm. Read more
We cannot express the importance of installing a bottom drain when planning and building your pond and these drains provide a cost effective way of doing this.
This kit comes supplied with 10 meters of flexible clear PVC airline (4mmID-6mmOD)
Available in 50mm and 110mm .
£35.09 inc. VAT Select options This product has multiple variants. The options may be chosen on the product page

Pro-Line 4″ Aerated Bottom Drain
Pro-Line 4″ Aerated Bottom Drain
The Pro-Line 4″ Bottom Drain is perfect for all gravity fed installations. Precision machine cut to the highest standard, a bottom drain you can rely on. 1″ separate pressure pipe air connection allows air to enter the drain independently from the water pipe outlet. We cannot express the importance of installing a bottom drain when planning and building your pond and these drains provide a cost effective way of doing this. Read more
Suitable for 4″ or 110mm pipework. Can be used with standard waste pipe with suitable connectors.

Pro-Line 4″ Aerated Bottom Drain Kit
Pro-Line 4″ Aerated Bottom Drain Kit
At Cotswold koi We understand that sometimes it can be confusing as to knowing what equipment you require to install a bottom drain, So we have put together this kit which will make your life a 100% easier. We find most filter bays are within a 3,6 or 9 meter distance from the bottom drain location so we have grouped together all the products that you require to install a bottom drain effectively without the headache. You can choose from either 1, 2 or 3 lengths of the required pipework to enable you to achieve most drainage Requirements. Should any further pipe work or fittings be required they can also be added via the pipework section on the website. Read more
3 mtr Pro-Line Aerated Bottom Drain Kit Includes :
- 1 x 4″ Pro-Line Bottom Drain – AP520
- 1 x 3mtr 4″ pressure pipe – PW7078
- 1 x 3mtr 1″ pressure pipe – PW7601
- 1 x 4″ 90 degree pressure swept bend – PW7645
- 1 x 1″ 90 degree pressure bend – PW7088 (07139)
6 mtr Pro-Line Aerated Bottom Drain Kit Includes :
- 1 x 4″ Pro-Line Bottom Drain – AP520
- 2 x 3mtr 4″ pressure pipe – PW7078
- 2 x 3mtr 1″ pressure pipe – PW7601
- 1 x 4″ 90 degree pressure swept bend – PW7645
- 1 x 1″ 90 degree pressure bend – PW7088 (07139)
- 1 x 4″ Straight joiner – PW7081 (07190)
- 1 x 1″ Straight joiner – PW7603 (07184)
9 mtr Pro-Line Aerated Bottom Drain Kit Includes :
- 1 x 4″ Pro-Line Bottom Drain – AP520
- 3 x 3mtr 4″ pressure pipe – PW7078
- 3 x 3mtr 1″ pressure pipe – PW7601
- 1 x 4″ 90 degree pressure swept bend – PW7645
- 1 x 1″ 90 degree pressure bend – PW7088 (07139)
- 2 x 4″ Straight joiner – PW7081 (07190)
- 2 x 1″ Straight joiner – PW7603 (07184)
£290.69 – £432.89Price range: £290.69 through £432.89 inc. VAT Select options This product has multiple variants. The options may be chosen on the product page

Pro-Line 4″ Aerated Bottom Drain Flange Kit
Pro-Line 4″ Aerated Bottom Drain Flange Kit
The Pro-Line 4″ Aerated Bottom Drain Flange Kit fits the Pro-Line 4″ bottom drain and allows you to use it with a liner. This Liner flange kit comes with stainless steel screws and its pre drilled with countersunk holes. Read more

Retro Fit Bottom Drain With Aerator
Retro Fit Bottom Drain With Aerator
The Weighted Suction Dome Range was developed for customers who have a new or existing pond but want the same great benefits that a bottom drain gives you, without having to rebuild your pond. Weighted Suction Domes are a great device and once connected will greatly improve the water circulation around any pond. This improved water circulation helps remove suspended particles and debris from the bottom of your pond, resulting in reduced maintenance. Read more

Spindrifter Liner Flange Kits
Spindrifter Liner Flange Kits
The Spindrifter liner Flange Kit allows you to use the drain with a liner. Read more
Comes complete with fixings.
4″ Flange
- 350mm external diameter
- 250mm internal diameter
- 5mm thick
- 50mm flange width
- 12 holes
3″ Flange
- 295mm external diameter
- 200mm internal diameter
- 5mm thick
- 48mm flange width
- 8 holes
2″ Flange
- 238mm external diameter
- 160mm internal diameter
- 5mm thick
- 40mm flange width
- 6 holes
Available for the 4″, 3″ and 2″ Spindrifter Drains
£21.59 inc. VAT Select options This product has multiple variants. The options may be chosen on the product page

Supa Tuff – Bottom Drain Lid (Retro Fit)
Supa Tuff – Bottom Drain Lid (Retro Fit)
The ideal solution for e.g. swimming ponds! Due to the strong rim there is a low risk when someone stands on top of the lid. The weight is distributed along the ring that rests on the bottom of a standard bottom drain. Very easy to insert/remove (for maintenance) with a koi net handle. Read more
Material: PE & stainless steel. Lid: Ø35cm x 1cm, bottom ring: Ø21cm x 2 cm. Total height: 20 cm.
NOTE: comes in separate parts, due to shipping size. Easy to assemble.

Tornado AirStorm 4″ Aerated Drain
Tornado AirStorm 4″ Aerated Drain
The Tornado Air-Storm bottom drain is a Premium quality aerated bottom drain for use in Koi ponds. Is has been manufactured using only high quality materials and uses a professional moulded drain lid with built-in air dome. The air supply to the dome is fixed inside the drain so no-need for any additional connections to the stem. Read more
4inch/1inch

Tornado AirStorm 4″ Aerated Bottom Drain Kit
Tornado AirStorm 4″ Aerated Bottom Drain Kit
At Cotswold koi We understand that sometimes it can be confusing as to knowing what equipment you require to install a bottom drain, So we have put together this kit which will make your life a 100% easier. We find most filter bays are within a 3,6 or 9 meter distance from the bottom drain location so we have grouped together all the products that you require to install a bottom drain effectively without the headache. You can choose from either 1, 2 or 3 lengths of the required pipework to enable you to achieve most drainage Requirements. Should any further pipe work or fittings be required they can also be added via the pipework section on the website. Read more
3 mtr Tornado AirStorm 4″ Aerated Bottom Drain Kit Includes :
- 1 x Tornado AirStorm 4″ Aerated Bottom Drain Kit – AP533
- 1 x 3mtr 4″ pressure pipe – PW7078
- 1 x 3mtr 1″ pressure pipe – PW7601
- 1 x 4″ 90 degree pressure swept bend – PW7645
- 1 x 1″ 90 degree pressure bend – PW7088 (07139)
6 mtr Tornado AirStorm 4″ Aerated Bottom Drain Kit Includes :
- 1 x Tornado AirStorm 4″ Aerated Bottom Drain Kit – AP533
- 2 x 3mtr 4″ pressure pipe – PW7078
- 2 x 3mtr 1″ pressure pipe – PW7601
- 1 x 4″ 90 degree pressure swept bend – PW7645
- 1 x 1″ 90 degree pressure bend – PW7088 (07139)
- 1 x 4″ Straight joiner – PW7081 (07190)
- 1 x 1″ Straight joiner – PW7603 (07184)
9 mtr Tornado AirStorm 4″ Aerated Bottom Drain Kit Includes :
- 1 x Tornado AirStorm 4″ Aerated Bottom Drain Kit – AP533
- 3 x 3mtr 4″ pressure pipe – PW7078
- 3 x 3mtr 1″ pressure pipe – PW7601
- 1 x 4″ 90 degree pressure swept bend – PW7645
- 1 x 1″ 90 degree pressure bend – PW7088 (07139)
- 2 x 4″ Straight joiner – PW7081 (07190)
- 2 x 1″ Straight joiner – PW7603 (07184)
If it’s for a liner installation then a flange kit is required and can be added to your basket separately .
£394.75 – £550.25Price range: £394.75 through £550.25 inc. VAT Select options This product has multiple variants. The options may be chosen on the product page

Economy Bottom Drains
Economy Bottom Drains
The Economy Bottom Drains will help reduce any build-up of waste or debris on the base of your pond, keeping it and your fish in the best possible condition. Suitable for many pond types including those made of Fiberglass, with a rubber liner and concrete ponds.
All Koi ponds should be fitted with bottom drains, and we strongly recommend this. These economy bottom drains are well made and are suited for use with 110mm or 50mm waste pipe. We cannot express the importance of installing a bottom drain when planning and building your pond and these drains provide a cost effective way of doing this. Read more
*NOTE: It cannot be used with pressure pipe without an adapter.
https://youtu.be/4hdSwxpXXo8
£17.09 – £19.79Price range: £17.09 through £19.79 inc. VAT Select options This product has multiple variants. The options may be chosen on the product page

Retro Fit Bottom Drain
Retro Fit Bottom Drain
The Retro Fit Bottom Drain, Portable Bottom Dome / Suction Drain improves water circulation, helps remove suspended particles and debris from the bottom of your pond reducing maintenance. It is said that you can not beat a bottom drain system. If you have a pond that does not have a bottom drain but wish you had installed one, or do you have a bottom drain and want to install another here is the answer. A bottom dome that sits on the floor of your pond which requires no digging or intensive labour. Just simply place the self -weighted bottom dome in your pond and attach a pipe from either an internal pump such as an oase aquamax or promax (these pumps have two inlets) or an external pond pump and enjoy all the benefits of a bottom drain with minimal expense. Read more

Spindrifter Aerated Bottom Drain
Spindrifter Aerated Bottom Drain
The Spindrifter aerated bottom drain is known worldwide for its quality and design. This Spindrifter aerated bottom drain completely replaces the “Standard Bottom Drain.” The most noticeable feature of the Spindrifter bottom drain is the extra 1 inch DIA Pressure pipe connection in the sump of the drain. This allows the air supply hose to enter the sump independent of the water outlet pipe, thus eliminating the possibility of restriction to the water flow and somewhere else for blanket weed to attach. Read more
Available Sizes:
- 4 inch Bottom Drain For Concrete comes with direct air feed kit
- 3 inch Bottom Drain For Concrete comes with direct air feed kit
- 2 inch Bottom Drain For Concrete
Recommended Air Flow:
- Bottom Drain at around 4/5 feet deep requires a 40lpm Air pump.
£293.39 inc. VAT Select options This product has multiple variants. The options may be chosen on the product page

Spindrifter 1 Inch Direct Air Feed Kit
Spindrifter 1 Inch Direct Air Feed Kit
The Spindrifter Direct Air Feed Kit allows you to hook up your air pump direct to the Diffuser; this means no Airline has to be threaded down the 1″ pressure pipe. This has a number of advantages but the main one is no water can find its way down the 1″ Pressure Pipe, which potentially will hold stagnant water and the dreaded blanketweed. Read more
This Direct Air Kit also prevents any back pressure, causing premature failure on your Air pumps.

Tommy Bottom Drains
Tommy Bottom Drains
These Tommy Bottom Drains are perfect for those using mid water feeds to the filter systems and are worried about pulling fish in to the filter, pumps etc. The Tommy Drain has its outlet at the Bottom of the Drain instead of the side of the drain like typical sump bottom drains. The Tommy Drain has a removable lid with stainless Steel screws and a flange ring for fitting to liner or concrete ponds. The Tommy Drain can still be used mounted in the pond base if required, such as for a quarantine system or where the outlet is best suited at the bottom of the drain instead of the side. The Tommy Bottom Drains are suitable for outlets from the side or bottom of your pond or filter. Read more
Available in the following sizes: 40mm, 50mm, 82mm and the most popular 110 mm.
£9.89 – £13.49Price range: £9.89 through £13.49 inc. VAT Select options This product has multiple variants. The options may be chosen on the product page
