According to Zurn (cited below) this is a permitted connection if the installation uses Zurn PEX and Zurn PEX fittings. PEX water piping should not be connected directly to a gas or oil fired or tankless water heater in two photos we can see red or blue PEX piping to the top of the water heater.īut your water heater is electric. So with this configuration is a failure at the top of the tank before the water can vent through its proper channel (the T&P valve) unheard of? - Anonymous by private email 1 If the T&P valve is still functional, I understand it won't open before it gets hotter or up to a higher pressure than is good for PEX. Something I didn't mention, but which shows on the picture of the water heater which I sent earlier and illustrated at WATER HEATER SAFETY, are the two hot and cold PEX lines leading directly to the top of the tank. source: (Zurn 2010) cited below Reader question: TPR Discharge tube: PEX is permitted but check with the TPR valve and heater manufacturer to be sure that the diameter restriction from PEX fittings is acceptable.Tankless water heaters: 12" or more from exhaust piping (because this piping an reach 460° F.).QuickPort Manifold (Zurn): 18" or more from water heater outlet.Gas water heaters, power vented: 6" or more from metal blower housing except if blower housing itself is plastic (then direct-connection is permitted).Gas water heaters: 6" or more from exhaust flue.Electric water heaters: Zurn PEX can be connected directly to residential electric water heaters used for domestic hot water (Zurn PEX uses brass adapters for this connection).Proper vs Wrong PEX Plumbing Connections to a Water Heater PEX Clearance Distances at Water Heaters We also provide an ARTICLE INDEX for this topic, or you can try the page top or bottom SEARCH BOX as a quick way to find information you need. We also discuss the use of PEX tubing for heating equipment discharge tube piping This article describes the requirements for copper or other metal piping to protect PEX piping from heat damage at a water heater. We have no relationship with advertisers, products, or services discussed at this website. InspectAPedia tolerates no conflicts of interest.
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