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  BOTTOM DRAINS




Example of how to plumb in the air supply to one of our aerated bottom drains.






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Coastal 12 Inch Pro Aerated Bottom Drain 4" (Concrete)

The New Improved Coastal Pro Aerated 4" bottom drain now with a 12 inch diffuser

Coastal Koi exclusive design bottom drain now has the very latest 12" Gummi Jager diffuser World leaders in this field

Has a 1" air feed direct to the diffuser, eliminating flexible pipe and means no stagnent water can accumulate in the air pipe.

The diaphram can handle 200Ltrs we recommend between 30-175 Ltrs

A real must have for any koi pond,its built to last has a 4" pressure pipe outlet but can also be used with waste pipe where a reducer sleeve will be required.

In our opinion one of the best on the market, fully tested and works superb.

Available for concrete or liner ponds. THIS ONE IS THE CONCRETE MODEL


Our price : £120.95 | Members Price: £114.90
Coastal 12 Inch Pro Aerated Bottom Drain 4" (Liner)

The New Improved Coastal Pro Aerated 4" bottom drain now with a 12" diffuser

Coastal Koi exclusive design bottom drain now has the very latest 12" Gummi Jager diffuser World leaders in this field

Has a 1" air feed direct to the diffuser, eliminating flexible pipe and means no stagnent water can accumulate in the air pipe.

The diaphram can handle 200Ltrs we recommend between 30-175 Ltrs

A real must have for any koi pond,its built to last has a 4" pressure pipe outlet but can also be used with waste pipe where a reducer sleeve will be required.

In our opinion one of the best on the market, fully tested and works superb.

Available for concrete or liner ponds. THIS ONE IS THE LINER MODEL


Our price : £120.95 | Members Price: £114.90
Coastal 9 Inch Pro Aerated Bottom Drain 3" (Concrete)

The New Improved Coastal Pro Aerated 3" bottom drain

Coastal Koi exclusive design bottom drain now has the very latest 9" Gummi Jager diffuser World leaders in this field

Has a 1" air feed direct to the diffuser, eliminating flexible pipe and means no stagnent water can accumulate in the air pipe.

The diaphram can handle 200Ltrs we recommend between 30-175 Ltrs

A real must have for any koi pond,its built to last has a 3" pressure pipe outlet but can also be used with waste pipe where a reducer sleeve will be required.

In our opinion one of the best on the market, fully tested and works superb.

Available for concrete or liner ponds. THIS ONE IS THE CONCRETE MODEL


Our price : £110.00 | Members Price: £104.50
Coastal 9 Inch Pro Aerated Bottom Drain 3" (Liner)

The New Improved Coastal Pro Aerated 3" bottom drain

Coastal Koi exclusive design bottom drain now has the very latest 9" Gummi Jager diffuser World leaders in this field

Has a 1" air feed direct to the diffuser, eliminating flexible pipe and means no stagnent water can accumulate in the air pipe.

The diaphram can handle 200Ltrs we recommend between 30-175 Ltrs

A real must have for any koi pond,its built to last has a 3" pressure pipe outlet but can also be used with waste pipe where a reducer sleeve will be required.

In our opinion one of the best on the market, fully tested and works superb.

Available for concrete or liner ponds. THIS ONE IS THE LINER MODEL


Our price : £110.00 | Members Price: £104.50
Coastal 9 Inch Pro Aerated Bottom Drain 2" (Concrete)

The New Improved Coastal Pro Aerated 2" bottom drain

Coastal Koi exclusive design bottom drain now has the very latest 9" Gummi Jager diffuser World leaders in this field

Has a 1" air feed direct to the diffuser, eliminating flexible pipe and means no stagnent water can accumulate in the air pipe.

The diaphram can handle 200Ltrs we recommend between 30-175 Ltrs

A real must have for any koi pond,its built to last has a 2" pressure pipe outlet but can also be used with waste pipe where a reducer sleeve will be required.

In our opinion one of the best on the market, fully tested and works superb.

Available for concrete or liner ponds. THIS ONE IS THE CONCRETE MODEL


Our price : £105.00 | Members Price: £99.75
Coastal 9 Inch Pro Aerated Bottom Drain 2" (Liner)

The New Improved Coastal Pro Aerated 2" bottom drain

Coastal Koi exclusive design bottom drain now has the very latest 9" Gummi Jager diffuser World leaders in this field

Has a 1" air feed direct to the diffuser, eliminating flexible pipe and means no stagnent water can accumulate in the air pipe.

The diaphram can handle 200Ltrs we recommend between 30-175 Ltrs

A real must have for any koi pond,its built to last has a 2" pressure pipe outlet but can also be used with waste pipe where a reducer sleeve will be required.

In our opinion one of the best on the market, fully tested and works superb.

Available for concrete or liner ponds. THIS ONE IS THE LINER MODEL


Our price : £105.00 | Members Price: £99.75
Bottom Drain Conversion Kit

A conversion kit including diffuser to suit standard bottom drains
Will fit most models, and has a stainless nipple to fit 9mm 3/8 pipe.


Our price : £69.95 | Members Price: £66.45
Aerated Bottom Drain Air Connection Kit

This can be used when making the final connection between the 1 inch air pipe from the bottom drain to your air pump,will fit 3/8 or 9mm air pipe.



Our price : £4.95 | Members Price: £4.70



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