Mar S ( Mas985 ) have indicated that I am having a severe suction dynamic head in my pool plumbing.
I want to install a vacum gauge for this purpose in order to see what improvement I get for every troubleshooting method I will be doing and to track down the culprit.
Is there any tips on good installation point ? The BW 300 flowmeter I just installed has installation do and dont, I am wondering if there is any installation tips for vaccum gauge that I should know of. I am also wondering if it will be easy for me to buy a PVC pipe adaptor where I can screw in the vacuum gauge.
I am also hoping that since 1.13 * Hg is equal to the suction head loss, it will be a much more accurate tool than my flowmeter which is +-10% accurate and I got a 100GPM model.
For those who is interested to know what I am troubleshooting, this is the data :
2BHP Hayward Super Pump. 1.5" plumbing all around, which I am not happy esspecially for the suction.
At 12 psi sand filter pressure almost very clean, I am getting 49GPM flow and that means I have 70 feet of Total Dynamic Head loss. So I have about 40 feet of head loss at suction, which Mark said it is so unusual.
I tried yesterday to remove one of the two plunger type check valves, but my flowmeter hardly register any improvement.
I think it is not accurate enough to let me view minor improvement, this is why I am looking at vacuum gauge.
If I am assuming 40-47 feet is the suction head, as per Mark calculation. That means 40 divided by 1.13 and that is 35Hg...Holy Cow, as far as I know the common vacuum gauge only goes up to 30Hg.
Any advice very appreciated. Thanks