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I'm working on a personal hobby extending the reach of my pressure sprayer, I'm using 5mm pipe to connect it all together, the issue I'm running into is once I start pumping pressure up, the little connectors I have give way and let the water out,

I was thinking about using cable ties to hold the pipe on but I wanted to know if there was a better way to seal a 5mm pipe.

the connector

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  • $\begingroup$ use pipe clamps $\endgroup$
    – jsotola
    Aug 12, 2022 at 0:42
  • $\begingroup$ There are many types of pressure sprayers. What type of pressure are you working with? $\endgroup$ Aug 14, 2022 at 5:46
  • $\begingroup$ It's not clear if the ID or OD is 5mm, but if you can get a push-to-connect fitting that fits the pipes OD, I find those are easy to use and reliable. $\endgroup$
    – Drew
    Aug 21, 2022 at 9:11

4 Answers 4

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Problem that elastic hose inflates under pressure and slips from such "herringbone". Any glue on such hose, i think, very likely will be teared off.

Consider using pneumatic fittings, better are with sleeve nut. Nutted are tolerant to hose diameter and type, and fast-connect require exact hose size.

Another solution could be addition of spring action hose clamp, matched to hose diameter. Cable ties or cheap worm-gear clamps can help, but they are unreliable in such applications.

Variation of previous solution could be putting tightly a piece of pipe or rigid hose on the end of hose after herringbone insertion into it. This pipe will clamp hose to herringbone and prevent its inflation and slipping.

Usually hoses for garden are black in order to prevent algae growth inside, but this is not a problem while water flow is large. Also some polymers degrade under sun radiation.

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I would go with compression fittings and use inner sleeves so the pipe is compressed onto the sleeve by the olive as it is a soft pipe.

enter image description here

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  • $\begingroup$ good idea but needs a threaded union and nut combo for fittings, $\endgroup$ Aug 12, 2022 at 14:00
  • $\begingroup$ @TonyStewartEE75 that is what is meant by "compression fittings". $\endgroup$
    – Solar Mike
    Aug 12, 2022 at 14:01
  • $\begingroup$ there are many types of compression fittings, I was just pointing out you need more than what is shown and that must match the hose material dimensions for OD and ID . $\endgroup$ Aug 12, 2022 at 14:23
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Hose clamps are normally used on hose.

as above enter image description here

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  • $\begingroup$ good idea............if it increases the pressure rating $\endgroup$ Aug 12, 2022 at 17:36
  • $\begingroup$ @TonyStewartEE75 These just keep the tube from slipping off the barb. I doubt the pressure rating of either part takes that into account. It's generally assumed that you will use something like this with a barb fitting if it's got to withstand any significant pressure. $\endgroup$
    – Drew
    Aug 21, 2022 at 9:13
  • $\begingroup$ I don't disagree. To prevent slipping the friction must be (much?) greater than the static force of water due to peak pressure * area. A reliable compression fitting or adhesive is needed. $\endgroup$ Aug 21, 2022 at 10:24
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Leak proof friction fittings with 60psi will be a challenge. I have had some success and many failures using PU polyurethane hose and fittings for water irrigation on 4 mm ID hose.

PU adhesive is best, I think, also called sub-floor adhesive in large tubes. But todays low volatile types cure slow in a day with exposure to air but stronger better adhesion than epoxy.

You might consider adhesive inside or out.

added

If you absolutely must separate the pipes annually, then try to find air or fluid hose threaded compression fittings and don't over-tighten.

enter image description here

The retention seal & strain depends on the rise of hose pressure due to the sprinkler starting.

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    $\begingroup$ I was hoping to not resort to using Glue but considering you have experience with these things and I haven't, it might be best to try it. thanks for the advice! $\endgroup$
    – Dr Nibbles
    Aug 11, 2022 at 22:23
  • $\begingroup$ Combine this compression fitting with the olive and insert I show and you are good to go. Personally used on many air systems and on my Volvo estate when I had air adjustable shocks on the rear. $\endgroup$
    – Solar Mike
    Aug 12, 2022 at 14:27

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