Coates Heater PH/CPH/CE/SHB/ST Thermostat (22002001) airinjectors A weir is useful because

A weir is useful because it helps regulate surface water entry into the skimmer

This American/Pentair Drain Plug Wrench [Clean & Clear/FNS] (192019) is engineered for fittings & valves: plugs applications

The stainless and gray finish gives this Waterway internal a more premium appearance

or otherwise no longer trustworthy

Coates Heater PH/CPH/CE/SHB/ST Thermostat (22002001) airinjectors A weir is useful becauseA thermostat helps regulate heater operation by responding to temperature conditions within the system, and this Coates thermostat is designed for compatible PH, CPH, CE, SHB, and ST applications where the original control part has drifted out of accuracy or become unreliable. When temperature regulation begins to fail, heater performance can feel less stable than it should. The broad model compatibility gives this part practical value because