Spray on foam insulation for exposed dump lines?

skipro3 wrote:
Wrap the pipe in saran wrapm cloth or other non-sticky, THEN apply spray foam. If you want the heat tape, lay that down before the saran wrap. The spray foam is immune to weather and road conditions and the wrap allows for the foam to be removed just like a cast on an arm or leg.

Sure wish I would have thought of this before I spray foamed everything!!

Dana

Without some form of heat on the warm side of the insulation, all you'll be doing is slowing how long it takes the two temperatures to equalize. I'd do the heat tape (on the outside of the pipe) then insulation, saran wrap in between if you're using a spray on foam. If you can find a pipe insulation the right size a tie wrap every few inches should keep it from blowing off on the road. You cold also use the insulation they sell to wrap over the heat tape, also secured with abundant tie wraps.

You can order any pipe size dimension pipe insulation from a commercial plumbing supply house. HD sells the thin stuff and only goes up to typical water size pipe. It fits very snug and won't blow off.

Wrap the pipe in saran wrapm cloth or other non-sticky, THEN apply spray foam. If you want the heat tape, lay that down before the saran wrap. The spray foam is immune to weather and road conditions and the wrap allows for the foam to be removed just like a cast on an arm or leg.

This Insurance Company recommends applying the tape on water pipes then put insulation over the tape.
I would think the same applies to dump lines.

I wouldn't use spray foam. If the tape goes bad or you need to get at the dump line for any reason, it will be a major mess removing the spray foam.

Just get the type that wraps around the line and can be easily removed if necessary.

Heaters would always be wrapped on the outside of the line....