I managed to replace a faulty Niagara A1412 Inflator Valve with this 703A. It fills up twice as fast as a new one. This is a plus and a minus, a certain amount of water hammer and an increased sound of water gushing from pipes. The A1412 has a dial, but it's hidden inside next to the diaphragm. At least that's where I found mine. Our drain tank can handle 1.4-1.6 gallons but this valve doesn't seem to go above 1.5 gallons, may need some adjustment but it works and I really don't want to mess with it and have to replace it again.
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