Join Date: Mar 2008
Location: Kapuskasing Ontario Canada
Mentioned: 7 Post(s)
The old manometer I used is of the same design but about 2 feet tall and uses coolant instead of water as it's a bit heavier and colored. There is also a restrictor in the hose on both sides near the top to reduce the pulsing for a more stable reading. They're metal plugs with a tiny hole in the middle... If you build the DIY gauge, you might want to try sticking an equal lenght of a pen's plastic ink cartridge that has the insert in the end. It fits pretty snuggly in 5/32" (3.83 mm) ID hose, in both sides near the top. It would also reduce the risk of ingesting enough water to cause hydro-lock and bend a connecting rod, which could pretty much ruin the day...
Last edited by invader; 10-01-2008 at 12:42 AM.