Could be a number of reasons: Your pressure gauge could be wrong, your filter may be partially clogged, your pump may be to big (to may HP) for your pool. In your instruction manual for your filter, it should tell you what the maximum PSI for your filter is. The pump manual should also tell you what the operating PSI is. Check them both to make sure that you're not damaging one or the other. Also, check to make sure that your pump doesn't have a low and high setting (or "turbo" setting). Some older pumps have these options. If your pump has one, set it to low and that should drop your pressure some.
What was the reading on the gage, while the system was running, before you changed it? Eight #'s pressure sounds about right but depends upon a few things. If it is reading zero with a new gage then you probably have a suction problem or there is no water flow. If you had higher gage readings before you replaced the gage maybe the filter was dirty. Have you backwashed the filter lately? k
Cleaning the filter will lower the back presure. or else a hole in a cartridge filter will also do it.
Something is allowing the DE to pass through the filter - probably a hole in one of the filter pads or a damaged manifold. You can take out the filter pads and visually check them. A hole will be fairly obvious.
The lower the pressure the less work the filter is doing, 7 to 10 psi is a good pressure. Another tip would be to put your hand by the outlet where the water goes back into the pool if the water pushes your hand away you have good pressure also take a pressure reading at the filter, if you put your hand at the outlet and the water does not push your hand away take a pressure reading, backwash the filter, put your hand at the outlet again if it pushes it away go back to the filter look at the gauge and see what it reads now, and that would be your suggested low pressure for your filter.
What was your clean starting pressure? When was the last time that you backwashed the filter? When was the last time that you broke the filter down and cleaned the grids in the proper manner? Sounds like your filter is getting dirty. k
Unless you have a loose or cracked fuel line or bad wiring connection causing the pump to not run or loose pressure my best educated guess would be that you didnt change the fuel filter when you replaced the pump in which case if the filter is plugged all of your pressure would be on the fuel tank side of the filter causing you to have little or no pressure at the test port on the fuel rail.
old rubber gasket stuck to block or to much oil pressure regulated by spring above oil filter Filter not tight, hole in filter,....
Remove the fuel fill cap that should take fuel pressure off and it would be safe to release the filter and change it!
It is unclear what you are asking. A contained gas will always exert pressure, but it would be incorrect to state that gas is pressure.
a hayward would tend the hedges and fences around the water meadow to keep out cattle and to impound any stray cattle.
I would say that the fuel filter is probley stoped up. If fuel filter is not restricked, Then check fuel pressure with a fuel pressure gauge.
It could but not likely. Do a fuel pressure test and be sure to replace the fuel filter. If you have low or no fuel pressure I would suspect the fuel pump is at fault.