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Thread: advantage to 2" plumbing on pad with 1-1/2 in. incoming pipe

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    advantage to 2" plumbing on pad with 1-1/2 in. incoming pipe

    Wondering if there would be any advantage/disadvantage to plumbing the "pad" with two inch pipes when incoming pipes are only 1.5" and the jandy valve and multiport are also only 1.5"?

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    Mod Squad woodyp's Avatar
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    Re: advantage to 2" plumbing on pad with 1-1/2 in. incoming

    You're just gonna confuse your water! Not a long enough run to matter. Just wondering............why would you bother?
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    Mod Squad jblizzle's Avatar
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    Re: advantage to 2" plumbing on pad with 1-1/2 in. incoming

    I did just that when I was planning to re-plumb my pad for a new pump and solar anyway.

    Biggest reason was to reduce the headloss in all the fittings. Sure the lengths are short, but all the Tees and 90s add a lot of head loss and by increasing the size you can reduce this and increase your flow rate.

    BTW, all Jandy valves are 1.5/2 or 2/2.5 or 2.5/3. What this means is a 1.5" pipe will slip into the valve, but a 2" pipe is the same size as the valve inlet and you connect them with a 2" coupler.

    If you are doing the work anyway, then it is cheap to increase the size. But there may not really be a point in re-doing the plumbing ONLY for the reason of increasing the size.
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    Re: advantage to 2" plumbing on pad with 1-1/2 in. incoming

    Buying new pump so just replumbing the entire pad. Thinking if the suction line ever needs replacing on the 30 year old plumbing I would upgrade to 2" and it would match the newer plumbing in the pad.

    Also your opinion on - are union valves more likely to leak than glued joints?

    Have you ever used a Pasco Ram Bit - plumbing tool that reams out the old pipe on a connection fitting so it can be reused when you are running out of usable pipe.

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    Mod Squad jblizzle's Avatar
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    Re: advantage to 2" plumbing on pad with 1-1/2 in. incoming

    Well, unions are probably more likely to leak than a glued fitting, but you just replace the o-ring and it is fixed without doing any cutting and gluing.

    I have not used a "fitting saver" but did just recommend trying it to someone else who has no pipe to work with here:
    is-there-a-pump-fitting-adapter-to-stop-this-inlet-leak-t58027.html
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