Service Life of EPDM Gasketed vs Traditional PVC Joints
Last Post 10 Nov 2017 04:00 PM by Gordon. 2 Replies.
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GordonUser is Offline
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08 Nov 2017 07:07 PM
I'm interested in warranty/service life of EPDM gasketed joints (in PVC or polypropylene) vs that of PVC cemented (chemically welded) joints. Am installing a furnace and want to use polypropylene for the combustion air/vent pipes. Centrotherm's Innoflue and DuraVent's PolyPro polypropylene HVAC venting products are designed from the ground up for this and are OKd by name in the furnace's install instructions. But, both use gasketed joints, not chemically welded joints.

InnoFlue and PolyPro are each only warrantied 10 years. At least some gaskets deteriorate so I'd guess PVC cemented joints will last longer but don't know. I've looked for cemented PVC joint warranties to compare but found no warranties or data on average service life of the joints. I'd be more comfortable if this were a water application but don't want to chance carbon monoxide leaks at joints.

Does anyone know if cemented (welded) PVC pipes are WARRANTIED and for how long? This would provide a direct comparison to the 10 years of confidence in the gasketed joints.

Failing warranty info, does anyone have anecdotal or, better, research- or certification/specification-based estimates of the SERVICE LIFE of EPDM gaskets (in polypropylene or PVC joints)? Or that of traditional PVC/cemented (welded) joints?

Thanks.
mtrentwUser is Offline
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09 Nov 2017 06:14 PM
I'd be hesistant to use solvent weld or any fixed weld in vent pipe. There will be constant expansion/contraction and the gasketed fitting allows for that without putting stress on pipes or welded joints.
GordonUser is Offline
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10 Nov 2017 04:00 PM
Thanks mtrentw.

Stiff inflexible PVC pipe (and chemical welds) that might split upon expansion/contraction vs joints that are cushioned but eventually will go bad anyone? Anyone? Bueller?
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