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I have a UPS 15-55 SFC running in a residential hot water circulation system. The plumbing was drained for work and then refilled. When turning on the pump, three days after refill and air purge from the faucets, the grundfos seemed to work - I could hear water gurgling through and then (I...

I recently reworked a plumbing system on my 3 year old house. The plumbing system was installed by a licensed plumber. I noticed a white residue and build-up inside the pipes. The residue was formed in bubbles or nodules on the inside of the fittings. The material holds together but will...

I talked to a PEX manufacturer and was informed that you cannot bend PEX sticks. Only PEX that comes in a roll. Does this sound right? The PEX in question is produced with the PEX-B manufacturing process (it has higher chlorine withstand, they call it PEX-R).

I am looking at splitting my long hot water circulation loop into two smaller loops. One idea is to have an electric valve on each loop and open and close as needed to circulate the hot water. Does anyone have recommendations on electric valves - brands and models - or a good source for...

Nibco Pex-R (like a pirate would say). I am trying to determine where this falls in the A, B, C pex types. Does anyone know the quality of this material? Good, bad, ugly? I have a data sheet from Nibco - see screen shot; but cannot find any link on the Nibco site. NibcoPexR by hardwite...

A recirc system with a timer that works well when the timer is on. But when off, the furthest appliance needs ~5 minutes to receive hot water. It is a long loop. I would like to split into two smaller loops to reduce the time. A shorter time would also allow me to turn the pumps on from the...