Domestic Water Re-circulating

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	Concept Ever got frustrated waiting for hot water in the morning or before taking a shower?... You are certainly not alone. Anywhere from 2 to 3 gallons of cold and/or warm water is wasted every time a hot water tap is turned on between long unused periods of time, especially in homes (buildings are equipped with re-circulating pumps to minimize this wasteful use of a precious resource - Water). Grundfos "Comfort" pumps are ideal for hot water re-circulating. Economical and easy to install, these small circulators help save water and energy cost, adding the convenience of instant hot water. APS Pumps & Motors has stock of these UP circulators especially designed for hot water re-circulating. Available in 9 models for every need and budget.

	All UP10-16B5 models have a brass body and 5' cord with 115V plug. Pipe connections are 1/2" sweat, 1/2" NPT and 1 1/4" Union NPSM. The models with built in thermostat can be set to stop at a preset liquid temperature. The setting range is 95-150°F. Thermostat function can be by-passed. Models with a built in timer can be set to start-stop at preset intervals, such as mornings and evenings, when hot water is in most demand and likely to have been 'standing' in the pipes longer, and therefore has cooled off. By turning the circulator on, that water is returned to the tank for re-heating, while 'fresh' hot water fills the pipes providing instant hot water without any water waste.
	The graph on the left showns the performance of this system. The head increases by a small margin (5.2 ft. or 2.25 PSI) and a the pump forces the water along the pipes in a very gentle flow (3.5 USgpm maximum.
	The comfort Valve offers another option to return the cold water in the pipes back to the Tank. It is simple to operate and install. NO RETURN LINE REQUIRED UNIQUE WET ROTOR DESIGN WHISPER QUIET OPERATION BUILT-IN TIMER AND POWER CORD COMES COMPLETE WITH PUMP AND VALVE
	Hot Water Recirculation - How It Works A return line is installed near the faucet farthest from the water heater. The return line is connected to the UP 15 series pump and flows back to the water heater. As water slowly cools in the hot water line, the UP 15 series recirculation pump then moves the hot water from the heater throughout the pipe back to the heater, creating a continuous loop of slow-moving warm water. When a faucet is turned on, warm water is instantly available for use with no waste.
	The graph on the left showns the performance of this system. Thesre is a maximum head increase of 3 ft. or 1.30 PSI and a very gentle flow (3.4 USgpm maximum).