Spindrifter 4" Pressure Bottom Drain - Concrete (1" Duct) TWIN INLETS For Ponds 0.09154886452623356 Your biological filtration will continue

Your biological filtration will continue and avoid a start-up in the spring

The Union also allows the unit to be removed if required for maintenance

This is a  simple way to install your  Amalgam Submersible UVC

Overall length 60mm

Spindrifter 4" Pressure Bottom Drain - Concrete (1" Duct) TWIN INLETS For Ponds 0.09154886452623356 Your biological filtration will continueThe Spindrifter bottom drain is known worldwide for its quality and design. This 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 sump independently 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