City water pressure for underbody wash

[vivoviva]

I got this M1 without a pump and I'm a little pissed. What size of nozzle do you recommend if I'll use city water pressure? And what nozzles specifically? I read something about Vee Jet but I'd like to be sure from someone who's tried it already.

 

[Okjokey]

You're absolutely on the right track with Vee Jet nozzles for a pumpless setup. I went through the same process of building a winter salt rinse bar for my car and learned that orifice size and spray angle become a delicate balancing act with low pressure. To really dial it in, you first need to know your home's static water pressure and GPM. What are you working with?

 

[To_uche]

Running city water pressure, something around a 1.5 to 2.0 GPM nozzle usually works well on the M1. Vee jet nozzles are also good too, you have to get one rated for your flow and pressure though

 

[CWbyChy101]

I got this M1 without a pump and I'm a little pissed. What size of nozzle do you recommend if I'll use city water pressure? And what nozzles specifically? I read something about Vee Jet but I'd like to be sure from someone who's tried it already.

For city water pressure, you'll want to go with a much larger orifice size than if you had a pump.
I think you can have good results with a 25030 or even a 25040 VeeJet for rinsing.
The wider spray angle and larger orifice help compensate for the lower pressure.
I've personally used a 25040 with decent city pressure for general rinsing on my M1 and it works quite well without a pump, giving a good spread for coverage.