An alternative is to pay a licensed plumber to install a float valve that automatically maintains the water level. Retention Pit, Pump and Pipework Step 1 Locate retention pit and excavate to seat the pit below the galvanised trough for the reflective pond. Cut a notch out of the grate with an angle grinder to allow room to run 25mm hose from pump. Step 2 Place pump in pit, run low voltage wiring to transformer located indoors. Run 25mm pipe underground up to brick wall.
Submersible pumps are available from waterfall, fountain and irrigation suppliers.
Step 3 Chase channel for pipe up through brick wall to required height by running two parallel grooves with angle grinder and notching out with a cold chisel or chasing tool. Step 4 Run 30mm overflow pipe from top of pit to storm water. Pebble Splashback Step 1 Cut piece of fibre cement sheeting to suit and fasten pebble mosaic sheet with construction adhesive. Alternatively you can fix individual pebbles to the sheet using construction adhesive. Step 2 Grout between pebbles with waterproof, coloured grout.