Cant really decide which to go with.. I am using them for my manifold / possibly other places if need be... was thinking that with threaded its nice to be able to remove them/ customize or whatnot.. However I feel you will lose some sort of pressure if you are connecting them rather than with slip its still going to be the same size inside? Which would you choose?
Threaded vs Slip?
- Thread starter Be102
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Idoc
Getting lazier and lazier with upkeep!
Slip... threaded leaves the possibility for leaks. Use a lot of unions and you can still take the plumbing apart to clean and replace easily.
JoshH
Tank Status: Wet...ish, growing things....
Most threaded fittings have a similar interior diameter as slip fittings so I wouldn't worry about head loss in that regard. It REALLY depends on the situation, most say slip with unions and I agree to a point. There are a few situation's where threads are just better or required, and if installed properly you will never have to worry about leaks. I have around 10 thread fittings on my set up and not a single leak. Remember, even a slip fitting without the proper amount of glue can and will leak too.
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dede
Active Member
I just did the plumbing on my used 180 and I wanted to rip my hair out with all the leaks from the threaded connections. Gave up and let the tank sit for a month before I went back to tackle it again. I replaced a lot of those threaded joints with the slip connectors and unions.
lacrosseboss18
Active Member
I debated this topic myself. I agree with what people are saying about going with the slip and then put unions. This way you can always change things up if you need to.
I agree with JoshH that if you install correctly it will be just as good as the slips BUT why take the chance. I would imaging The rubber gasket would cause more issues before the threaded portion would.
go Slip
I agree with JoshH that if you install correctly it will be just as good as the slips BUT why take the chance. I would imaging The rubber gasket would cause more issues before the threaded portion would.
go Slip
JoshH
Tank Status: Wet...ish, growing things....
Mine are threaded gate valves and each one has a union before them. I didn't have a choice and was stuck with threaded valves so did a slip union/spigot x male thread/threaded valve. If you're going with schedule 80 you can get true union gate valves and forgo the union all together.
I would just use a true union ball valve instead of separate ball valves and unions. Use silicone in threaded connections and they’ll never leak und are reusable unlike glue joints. It’s funny we talk about saving the reefs but have no problems wasting pvc fittings because they are “cheap”.
JoshH
Tank Status: Wet...ish, growing things....
My bad, thought some spears gate valves had unions on them, been a while since I looked for valves. I guess that was another reason why I used a separate union lol
True union gate valves, Where?
Not a gate valve and not as nice as a cepex brand valve or similar but a solid valve at a good price. My local lowes has them both threaded and slip. Also I wouldn’t recommend a gate valve to regulate flow, a ball valve is better suited for this and even better would be a globe valve.
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Be102
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Would you suggest using one of these https://www.pvcfittingsonline.com/3-4-sch-80-pvc-male-adapter-spg-x-mpt-861-007.html to a threaded gate valve?
