Multiple water heaters are installed in parallel

Plumbing · Conventional Tank Type Water Heaters · printed page 280 (PDF page 281)

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Multiple Water Heaters Installed in Parallel Plumbing

Text in the illustration

floor framing
cold
hot
gas water heater
gas
main shut off valve
foundation wall
basement
cross section

Generated explanation

A basement cross section shows two gas-fired storage-tank water heaters connected in parallel. The blue cold-water supply rises past a main shutoff valve and branches through a common manifold to the cold inlet of each heater, with an individual valve on each branch. Red piping joins the hot outlets of both tanks into a common hot-water distribution line. Arrows indicate cold water flowing into both heaters and hot water flowing out toward the shared outlet. Gas supply connections, short vent sections, and side-mounted discharge piping are also shown, alongside the foundation wall and beneath the floor framing.

Components

gas-fired tank water heaters cold-water supply piping cold-water manifold hot-water outlet piping hot-water manifold main water shutoff valve individual cold-water shutoff valves gas supply piping gas control valves draft hoods vent connectors relief valve discharge pipes foundation wall basement floor floor framing

Materials

wood framing concrete metal piping metal water heater jackets soil gravel