Thred size Ultra 150 head water fittings?

[x2ryder]

Whats the thred size the the water fittings on a Ultra 150 head? I realize the innner size is 5/32. But My 1/4 straight fittings are too tight when I try and screw them in.

[steve45]

I don't remember, but this has been discussed before (at least on the Skiworx site). The threads are NOT NPT.

[x2ryder]

I figured it out. They are 1/8 x 27. Hey I thought only one of the fittings was 5/32. But when taking the oem fittings off the heads they all look to be 5/32?

[steve45]

Remember that one of the original fittings has an orifice in it.