MTM PF22 quick connect question

[irvsmith]

Thank you all. I got some water piping tape and will try it on my next wash. I’ll report back what I hear from MTM hydro.


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[fly07sti]

The thread tape should help. Definitely don’t want to over torque anything because the cannon head may crack.

[irvsmith]

Here is what I heard back from MTM Hydro this morning.

Yes, the quick connect supplied is ¼” NPT while the threads of the PF22 is ¼” BSP threads. You will want to remove the fitting, wrap 6-7 times with Teflon and re-install. It will typically only install about 3-4 threads deep, which normal. Do not over tighten as this could strip the brass threads on the PF22 since the Steel plug threads are stronger. This should eliminate the issue.


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[briarpatch]

thats what I thought.....this explains it:

NPT and BSP threads are generally not compatible due to the differences in their thread forms. NPT threads have a 60° included angle and have flattened peaks and valleys; BSP threads have a 55° included angle and have rounded peaks and valleys

[oneheadlite]

Awesome info briarpatch! Thanks for that.

Weird they’d supply a fitting with not-the-right-threads. Wonder what led to their decision to use the BSP threads?

[SWETM]

Awesome info briarpatch! Thanks for that.

Weird they’d supply a fitting with not-the-right-threads. Wonder what led to their decision to use the BSP threads?

I agree it seems strange with not compatible threads. The stress on the brass would be high.

I also thought that the PF22 was of stainless steel. It's a djungle with the fittings with all of the different threads and sizes and also materials.

[briarpatch]

Awesome info briarpatch! Thanks for that.

Weird they’d supply a fitting with not-the-right-threads. Wonder what led to their decision to use the BSP threads?

The BSP threads on the foam cannon are likely because the units are made in Italy. The quick disconnect is made in China

[PaulMys]

Just saw this thread. But everything briarpatch says is correct.

Always use Teflon tape on any fitting threads handling pressure.