OK, my son and I are having an argument on which is best to use on a 2" PVC mainline. He says, a slip fix is fine if your connect it fully extended. I say for this repair you should only use a compression fitting. What say you???, and why??? Thanks!
Compresson Fitting vs. Slip Fix
reb12
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Also agreed, and will be the easiest to put together assuming you can measure and cut accurately.
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I don't like compression fittings on pressurized lines.The composition of the backfill material enters into it.
About 25 years ago we had a mainline out to a small apricot orchard that was 2" and was buried about 36" deep to give the tilling equipment plenty of room. A bad glue joint was replaced with compression fitting (sometimes called a "kubota"). The soil was a heavy clay and the swell and shrink from wetting and drying eventually allowed the fitting and pipe to shift and leak again. Granted this was unregulated pressure of about 120 PSI as I recall. Thrust blocks might have been a good idea if somebody had thought about it. The final repair we made used 4 ells.
About 25 years ago we had a mainline out to a small apricot orchard that was 2" and was buried about 36" deep to give the tilling equipment plenty of room. A bad glue joint was replaced with compression fitting (sometimes called a "kubota"). The soil was a heavy clay and the swell and shrink from wetting and drying eventually allowed the fitting and pipe to shift and leak again. Granted this was unregulated pressure of about 120 PSI as I recall. Thrust blocks might have been a good idea if somebody had thought about it. The final repair we made used 4 ells.
This is true...but there is a huge difference between 'Fabricated' fittings and 'DWV Molded' fittings. The molded are for "Drain, Waste & Vent" non pressure applications. Section 6.4 also says:
DWV Fittings - NPR
WYE, Combo WYE, etc. DWV - NPR
And yes I have seen what a 4" DWV ell looks like when it is subjected to 120 psi on a golf course. It makes a helluva hole when it comes apart!
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:laugh: :laugh: :hammerhead:
Mike...The Chairman of the Greens committee called and said that I had made a faulty design and sold them defective fittings. (I was working for a supply house in So. Texas) They had put the system in themselves.
Drove the 100 miles -one way, to check out the problem. He took me over to a pile of pipe and fittings that they had taken out because of breaks.
I took one look at the fittings and told him that I hadn't sold the DWV fittings to him. He then remembered that they had messed up a few connections and had to cut them out. One of the members ran a hardware store and he brought them the needed fittings. Of course the only ones he had in 4" were DWV. Blew the end right out of the ells.
He apoligized and then took me to dinner at the Country Club. Rode in his restored '58 Vette convertible. Then we went a played a round of golf. All in all not a bad trip.
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Great story Jerry, I bet your heart was pumping JUST a tad whilst driving
to the site. Steak & lobster...."waiter, more champagne".:laugh:
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Agreed, NPR fittings have no place in any pressure scenario, use of low pressure DWV should be used with extreme caution, hence the reason for the second post with numbers to SCH 40 fabricated fittings.
The wye is rated to 235 PSI up to 2 1/2", the elbow at 280 PSI.
http://www.spearsmfg.com/prod_dimensions_spec/40-4-0507_0507_web.pdf
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I've got so many Kiril pdf files on my desktop I've started a special file called:
THINGS FROM KIRIL
THINGS FROM KIRIL
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Did you miss the "SCH 40 fabricated fittings" part in my last post?
Knowing what materials are available gives you different options to approaching a problem. I did not say it was the preferred or best solution to the problem, just one approach. In fact, I probably wouldn't have even thought of it had I not run into a design problem with my houses central vac system.
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Kiril knows the serial # of his pocket pen protector.
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That's how the west was won.that's harsh, bruddah
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