Air Domes and Drains

Air Domes and Drains

The Koi Pond Air Dome Bottom Drain

This Bottom Drain should be the only one considered when designing your Koi Pond, It is constructed using only the best materials because it needs to be 100% reliable once built into the pond base.

This High Quality Bottom Drain unit completely replaces the "Standard Bottom Drain". The most noticeable feature is the extra connection in the sump of the drain.
This allows the air supply hose to enter the Spindrifter Bottom Drain 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.
The membrane and backing plate fit into a recess in the specially manufactured dome (provided). The recess in the dome prevents the the membrane from becoming detached.
The complete assembly is secured to the bottom drain by means of a stem, which also provides the air inlet. Most water pipe sizes can be accommodated, the customer to specify.
The air inlet is via a nickel plated connector. The tube size can be specified by the customer. A connector for tube sizes up to 1/2" bore will be supplied at no extra cost.

Spindrifter Weighted Air Dome

The Weighted Air Dome

Quality Spindrifter Airdome with weighted base for use with Air Pumps of over 25ltr/min.
Highly recommended and used at Cascade. This Spindrifter Air Dome can be fastened to existing drains or used in any pool to provide large amounts of air and oxygen to aid circulation, and works very efficiently drawing particle matter towards either a drain or a pump fed filter system.
The Spindrifter Airdome/Airstone promotes water circulation into the bottom drain, or keeps waste matter on the move until picked up by the pump, improving the removal of solids from the pond bottom
The Spindrifter Air Dome is fish friendly - no sharp edges to cause damage to fish
Various fittings available to suit all ponds and drains in common use.
The 1/2" hose connection fits most air pumps on the market.
Self cleaning air dome
Does not block up like air stones

Bottom Drain Air Dome Conversion Kit

The Bottom Drain Conversion Kit for either installation into existing ponds with Non-Standard Bottom Drains utilising a socket on the base of the Bottom Drain.This unit is primarily designed for ponds that have "Non Standard" Bottom Drains, i.e. large sumps and / or domes or no stems. Again a shrink band secures the membrane to the backing plate.

The aerator assembly fits to the customer's dome via a hole cut through the centre of the dome and sits on a "make up" piece, which is provided to fill the space between the aerator and the dome. The complete assembly is secured with a stem, as shown, or with an adapter manufactured to the customer's requirements. In both cases, the stem or the adapter provides the air inlet. The air inlet is via a nickel plated connector. The tube size can be specified by the customer. A connector for tube sizes up to 1/2" bore will be supplied at no extra cost. The air supply pipe can be brought down the 4"/110mm water outlet pipe or through the gap between the dome and pond bottom. Weight of the unit 1.75 Kg

The Economy Bottom Drain

Economy Bottom Drains For Koi Ponds on a Budget

Large Sump Bottom Drain For installation at lowest point of pond. A must for gravity fed systems. Ideally suited for draining heaver particles to waste or filter system. Can be reduced down to 3” if required. 4” (110 mm) exhaust.

Bottom drains today are used in conjunction normally with a gravity fed filter systems, but more people are using them with pump fed systems. However, which ever way you decide, either way is far better than not having a drain installed at all. A chamber of filter brushes holding back debris in a pumped system cannot compare to a bottom drain working in conjunction with a vortex settlement.

Much has been said about the use of pressure pipe as against general waste pipe, but when you consider the short run of pipe, which is laid under the actual pond, then this in our professional opinion, should be laid in PVC pressure pipe. Once the drain line is clear from under the pond construction area, by all means run this into general waste pipe, but not with rubber seal (push fit) adaptors. Solvent weld with appropriate pipe adhesive all buried pipe . . . that's the general rule of thumb! It is not worth thinking about repairing a leaking pipe or drain beneath the base of the pond,in so far as the damage incurred to the concrete floor or fibre glass finish - just to save a few pounds in sub standard pipework or cheap materials. The minimal savings advantage cannot compare to major excavation such areas a second time around - to say nothing about disturbance to fish and biological filters. So take note - you have been warned!

All drains should be set in concrete along with the pipework under the pond footings. Deep benching towards the bottom drain will ensure movement of solid wastes into the sump of the drain and then this can be carried on with the water flow and finally into the filter settlement area, where it can be discharged to waste daily.

Drains are available in 110mm outlets or 4” outlets, so please specify when ordering. Drains are available for concrete application or for liner constructed ponds.

Economy Bottom Drains

Economy Bottom Drains

Economy Bottom Drains Large Sump Bottom Drain For installation at lowest point of pond. A must for gravity fed systems. Ideally suited for draining heaver particles to waste or filter system. Can be reduced down to 3” if required. 4” (110 mm)...
Spindrifter Air Dome Bottom Drain

Spindrifter Air Dome Bottom Drain

The Koi Pond Air Dome Bottom Drain This Bottom Drain should be the only one considered when designing your Koi Pond, It is constructed using only the best materials because it needs to be 100% reliable once built into the pond base. Spindrifter...
Spindrifter Weighted Air Dome

Spindrifter Weighted Air Dome

The Weighted Air Dome Quality Spindrifter Airdome with weighted base for use with Air Pumps of over 25ltr/min. Highly recommended and used at Cascade. The Spindrifter Airdome/Airstone promotes water circulation into the bottom...