Plumber quotes installing system using cross-over valve which some way ties the recirculation through the cold water pipes. This sounds like a short-cut. Are there any disadvantages to this system?
not sure what you are building or designing, city water or well water or truck tanker delivered water, water boiler for heat is common or isolated with shared heat for hot drinking water or there is a separately heated water heater, inexpensive unlimited water or inexpensive gas or oil are all design factors for plumbing. add-on pumps can improve water pressure or shorten the time it takes to get hot water at the tap or shower.
what your plumber is installing is a pump and temperature sensor under a sink , hopefully the furtherest from the water heater. what it does is sense when the hot water temp drops below a certain point, at which time it pumps the water into the cold line until the temp rises again.. the obvious advantage being , not having to wait a long time at the faucet for the water to get hot.. the also obvious disadvantage being electric consumption.. not only for the pump and controller , but also with the water heater clicking on a little more often.. not a lot of expense but a balance against convenience..
You may contact with Guru Contracting Ltd. They have 30 years of experience, with fully qualified plumbers and fully stocked vans. They do Plumbing repair, services and installation.
