Hi David,
Most recommend nothing over 60 lbs. which is about house pressure. When in doubt, use a pressure reducer on the hookup. Or do not open the supply valve far enough to create a problem. Both will keep you out of trouble.
Joseph
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1976 Newell Classic (Sold)
Home Base: Riverside, CA
If anyone needs my contact info private message me and I will send it to you.
-Joseph-
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