Can someone please explain the difference between dvw and water pipe as it pertaines to copper pipe fittings I asked this a while back and got one answer that was still a little bit vague , or more likely I'm still a little bit dumb! I think it has to do with the way the fitting s couple up as well as the sweep?:confused: thanks tallgrass

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The hub (socket) on a water fitting is deeper to allow for more soldered surface area and the bends are much closer (close ruff) -- Although you can find water fittings with a longer sweep.

Drainage fittings have a shallower hub (socket) because it isn't considered a pressure fitting and the sweeps are longer.

An drain ell will be slightly over 90 degrees to go from vertical to the proper slope to drain.

A drainage fitting, fits the descriptions above with one other thing, drainage tee's are built with a natural curve in them to turn the water down stream and to also prevent a drain cleaning snake from turning up ward

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Originally Posted by tallgrass

can someone please explain the difference between dvw and water pipe as it pertaines to copper pipe fittings i asked this a while back and got one answer that was still a little bit vague , or more likely im still a little bit dumb!! i think it has to do with the way the fitting s couple up as well as the sweep?:confused: thanks tallgrass

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All excellent answers by the other experts. Let me add a bit to their answers.
A copper DWV,(Drainage/Waste/Vent) fitting,(see image) has thinner walls since less pressure's involved, shorter hubs for the same reason and a longer radius for better drainage.
A copper pressure fitting, (see image) has thicker walls to accommodate the increased pressure and a lomger hub to give it better bonding quality when soldered. Pressure fittings can also come in longer radius sweeps to reduce pressure loss in water lines. Hope this answers your question. Tom

"thanks for your clarification i notice that the dwv fitting has only one side
to accomadate for the insertion of pipe to connect to ,is this indicative of all
dwv fittings? thank you for your help! "

No, This is a street 45. I used it because it showed the shorter hub better then the other images. All fittings have two hubs with the exception of street fittings which only have one. Regards, Tom