I bought a manometer off Amazon a week or so ago. I needed something allow me to connect it to the 1/8" hole used to check the pressure on my stove. I went to Lowes last night and picked up a few fittings from the plumbing department, and they worked great. I spent about $6 on them. The hose and the fitting on the end of the hose that you see in the picture below came with the manometer. The other 2 fittings were the ones I bought. I ran the stove on high for an hour (It got up to 84 in my living room), and checked the pressure. It was -.34. I had to close the damper almost all the way to get the pressure down to -.17. The stove has been running great. Hopefully, now it will run even better.