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Author:
GardenerZ (FL)
We live in north FL near the GA state line & inland from the coast. In a very cold winter we just might get 23F for only an hour or two. We will have to install PEX tubing in the attic in order to move the HWH to the garage as we are on slab & no basement or crawl space. We will also be putting a Bell & Gossett LR circulating pump on the HWH so the hot water gets to the master bath rapidly. Should we use the pre-insulated AquaPex tubing or will the regular AquaPex be fine & not freeze? I was thinking since there will be a circulating pump, it would keep warm water in the lines so there would be less chance of the PEX freezing but I'm not sure & know the pre-insulated PEX is much pricier. I know I don't want any broken lines & water damage so will willingly spend the extra for the pre-insulated if necessary.
The next question concerns the connectors or fitting types for the PEX. I've read/heard that the crimps can tend to leak after a while and that the shark bites are not a good idea. Today I heard of PEX Press fittings and it seems there are more fittings yet. It all gets a little confusing. Again, the biggest issue is I sure would hate to have a connection leak & cause water damage.
I appreciate your feedback & opinions or experiences.
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Author:
Wheelchair (IL)
You have the choice of insulating the PEX, with foam. In some extra area, (FROST-TEX) heat cord should be considered. Lastly, moving waters generally don't freeze. They is why it is advisable, up North, to let the cold water drip during subzero temps.
Best Wishes
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Author:
Pipe runner (AZ)
I would suggest shark bite just for ease of use but we would expand the PEX and use Uponer fittings and rings.
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Author:
packy (MA)
i haven't seen nor heard of cinch clamps leaking.
i use viega press sleeves. the problem is you need special tools.
1/2 inch wall armaflex would be my choice for insulation. it comes in 6 foot lengths and just slides on.
if the coldest you see outside is 23F then the attic will be a few degrees warmer plus there will be no blowing wind inside.
a recirculating pump will keep the water moving and prevent freezing.
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