These Spindrifter Replacement Air Domes replace the standard dome on your 4" bottom drain. The unit has a wide diameter rubber insert with thousands of tiny holes to allow the air flow to come out.
The air line supply can either be inserted inside the length of the bottom drain pipe - coming out at a convenient place near to where your Air pump will be situated, or it can, be simply run across the base of the pond to your Air pump.
These Spindrifter Replacement Air Domes replace the standard dome on your 4" bottom drain. The unit has a wide diameter rubber insert with thousands of tiny holes to allow the air flow to come out.
The air line supply can either be inserted inside the length of the bottom drain pipe - coming out at a convenient place near to where your Air pump will be situated, or it can, be simply run across the base of the pond to your Air pump.