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Thread: smaller inlet orifice as poor man's massage jet?

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    smaller inlet orifice as poor man's massage jet?

    working on the inlet/outlet placement for my hot tub, i realized i could put a couple of small orifices around the tub at back level for the inlets, which would not be too different from massage jets. i know it would increase the system head and so make the pump work harder, but maybe these little nozzles could get me out of adding the separate jet pump and orifices (my jet needs are modest, this isn't a commercial spa or anything). i would like to know your thoughts.
    plumbing up wall-mounted equipment and plenty gauges below a 500G wooden outdoor hot tub.

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    Re: smaller inlet orifice as poor man's massage jet?

    i realize this provides no aeration but see no reason that an air pump couldn't be hooked up to the plumbing instead of a dedicated jet. not sure whether it is normal to aerate for proper jets, never had them before.
    plumbing up wall-mounted equipment and plenty gauges below a 500G wooden outdoor hot tub.

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    JasonLion's Avatar
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    Re: smaller inlet orifice as poor man's massage jet?

    Getting jets specifically designed for a hot tub generally gives a better experience, and some decent jet fixtures are available for reasonable prices. Still, what you propose could also work.

    However, while I can't be sure without way more detail, I suspect your "jet pump" issue is misplaced. Most commercial jets are designed to get maximum effect for reasonable amounts of pump effort. DIY jets are likely to need a larger pump to get the same effect.

    Also, I am not sure what your reasoning behind talking about a separate jet pump is. It is quite possible to build a spa with only a single shared pump that still has good jet action.

    Aeration is not at all required, but it does tend to give you a better jet experience for a given amount of pump energy.
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    Richard320's Avatar
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    Re: smaller inlet orifice as poor man's massage jet?

    My spa has two returns hooked to a venturi that get fed from the pool pump-filter-heater. It also has five returns and a separate drain that goes to a booster pump. I never used the booster pump and it sprung a leak and seized and I never bothered fixing it. You don't need a booster unless you want a huge amount of bubbles. I don't. It wastes heat, blowing cold air up through the warm spa, and the returns are just at the right height to pound the kinks out of my back and shoulders when I'm seated.
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    Re: smaller inlet orifice as poor man's massage jet?

    got it - i had been under the impression the separate jet pump was more normal. i will keep working with the one-pump design, and thank you.
    plumbing up wall-mounted equipment and plenty gauges below a 500G wooden outdoor hot tub.

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    Isaac-1's Avatar
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    Re: smaller inlet orifice as poor man's massage jet?

    One other thing that you may want to try is to installer spinner outlets fittings to get the massage effect.
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    Re: smaller inlet orifice as poor man's massage jet?

    thanks for the tip, am looking into them!
    plumbing up wall-mounted equipment and plenty gauges below a 500G wooden outdoor hot tub.

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