Finished Hot Water Manifold

I’d been pulling lots of tubes throughout the house, but I couldn’t use any of the faucets until I finally finished soldering together this hot water manifold.  It has 14 total valves plus one on the bottom to drain it.  That is less than the 20 valves the cold water manifold required.  This is because toilets, outdoor faucets and the ice maker all only need a cold water supply line.

Water Manifolds

I drew the diagram below in MSVisio, and have taped it on the wall next to my hot and cold water manifolds.  In my diagram you can see my strategy to put the temperature sensitive loads near the center and top where they should have the best pressure and least impact from things like toilet flushes.

With both manifolds finished, I can start connecting up more faucets.

———– (edited below, 10-12-2012) ——————

Looking back at my design, I’m very pleased with how it performs.  It took a long time to pull all these PEX lines to each faucet, but it performs far better than my old house did where a toilet flush was scalding devastation to anyone in the shower.  I have had no issues with fluctuating water pressure.

However, I would have changed one thing.  In the master and main bathrooms I have 2 sinks.  In those locations I would have run a single shared line to the two sinks for hot and cold.  Currently, I have a dedicated hot and cold line to each individual sink.  When two people use those sinks simultaneously, they both have to wait while the hot water reaches the faucet.  If these faucets shared the same hot water line, only one person would have to wait for warm water.  This would also waste less water.

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