The membrane and backing plate of the Spindrifter fits into a recess in the specially manufactured dome (provided). The recess in the dome prevents the membrane from becoming detached.

• Specially Manufactured Dome
• Recessed Air Diffuser
• Socket Solvent Welded
• Triple Run Welds
• 4" Water Outlet
• 1" Air Inlet
• Fish Safe
• 4,500 openings in the air diffuser
• For Concrete or Liner Ponds

The complete assembly is secured to the bottom drain by means of a stem, which also provides the air inlet via a nickel-plated connector. All constructional materials are PVC and self-tapping stainless screws. All welds are triple run, suitable for concrete, fiberglass, or liner pond construction.

• Airtech 40 Air Pump
• Hi-Blow 50 Air Pump

One of the most important pieces of equipment when constructing a Koi pond has to be - a BOTTOM DRAIN. Without a bottom drain a Koi pond cannot function to it's supreme efficiency.

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 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.

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.