Suburban stove regulator pressure

[ps2000]

So I was doing a drop pressure test with my manometer connected to one of the burner tubes on my range. The meter showed 13"wc after the stove regulator. I thought it should be down to 10"wc after the stove regulator? What gives?

[Old-Biscuit]

This is a repeat of your 10AM post(S)

Duplicate post....1 of 3 this AM

Click on link for answer.

[starcraft69]

.

[starcraft69]

When is the last time you calibrated the manometer?
Specs show 11 wc - 14 wc