The well is drilled, approximately 120 feet deep. It was drilled in 2006 when I constructed my home. In the basement of the house, the main water line comes in and connects to Gould V60 pressure tank. The pressure switch is 30/50 and the bladder is pressurized at about 27. There appears to be a check valve in the T package on the supply side of the T. I have not noticed any loss of pressure in the tank. My well water system works perfectly, EXCEPT when it has been sitting for a period of time (hour or more). On the supply side of the pressure tank, when the well first turns on in the morning (after toilet is flushed, water running, etc.), there is a single pound hammer that can be very loud at times. Once this happens, as long as we use water on the regular basis, we will not hear the noise again. However, if it sits for a while (hour or more), the same bang. My theory is that the foot/check valve located at the top of the submersible pump (or wherever it is located), has gone bad, allowing the water in the line from the pump to the pressure tank to leak out, replacing it with air, and causing a hammer-type bang when the pump turns back on. Unless we use water in the house, the pump does not cycle on/off. I assume that is because the check valve on the t-package is preventing any water in the pressure tank from leaking out. Any thoughts on other things I can check before calling my well guy to pull the pump and replace the foot/check valve? Thanks for any guidance.

Hi, I had a pro flo 500slpt concrete aerobic system installed a little over a year ago a block or so from the Texas gulf coast.Elevation is 13' and the ground is a non-draining clay.(it use to be a rice field!) When it rains I have standing water slightly over the base of the access caps.It must be leaking in somewhere.I live in a pretty much permanent rv,collect my own water and use solar for power.My set-up is unique. Normally the aerator is running and the alarm powered. In order to pump it out I have to fire up the generator as it has quite the power draw.I can pump it down when the alarm sounds and the 2 sprinkler heads can take over 2 hours to complete the job. 5 days later the alarm is going off and I have to repeat the process. I live alone and use very little water. On a very rainy day another week or so later I had all the breakers off during the day to conserve a little power. When I turn aerator and alarm on the alarm sounded.So as not to bother the neighbors I turned the alarm ONLY breaker off. The sprinklers didn't start when I tried to pump it out. I went back and turned the alarm breaker on. I looked over the fence again and it was bubbling/blowing out water I think....or maybe air?...on the concrete side from under the edge of the lid like a strong natural spring (The installer backfilled the tank LEVEL and uncompacted so now with settling there is at least a foot of water all the way around system.) Water looked/smelled clean. After a minute or two it stopped and the sprinklers kicked in.It wouldn't do anything without the alarm only breaker on which seems pretty weird.There is so much standing water here it doesn't go up or down so even if water was gushing into it you wouldn't see a change in the water level. The bubbling water was coming out by the outlet baffle I believe. I have a great photo with the standing water and the area the water was coming out circled but I can't seem to upload it here. My installer is let say.... an idiot. He has never given me any record of maintenance,terms of contract or anything.I'm sure he hasn't been coming as often as he is required. I'm disabled and usually home. He comes over,goes to the system and leaves when he's done! Never comes to the door. Then he sends me an email saying there was no power and the whimpy grass is too tall. I was waiting for him to turn it on so I could show him what it was doing. He wants 420.00 to fill in the dirt and put on 6" risers. I took a lot of photos when he installed the system and one shows the risers sitting on the ground next to the tank! Guess he decided not to use them.Pretty sure I had already paid for those. I researched about 50 things an installer is suppose to do on an install and he violated about 20. Two key ones that he should know after at least 20 years of doing this are "The tank shall be designed and constructed so that all joints, seams, component parts, and fittings prevent groundwater from entering the tank, and prevent wastewater from exiting the tank, except through designed inlet and outlet openings." and "The backfill material shall be mounded over the excavated area so that the center of the backfilled area slopes down to the outer perimeter of the excavated area to allow for settling." Duh! Anyone that has dug a big hole knows to mound it because it will settle and this is far from his first install. I guess he figures this will be a way to make more money down the road. I could fill in a 4" depression myself but this hole will take a dump truck full of sand or soil. Oh yeah.....the system was NOT powered for a year because the electrician installed breaker on generator powered only side.A maintenance provider coming every 4 months should have caught that. (In a year and a half he has never found it powered on yet he does nothing about it...like knock on the door for starters.) I finally figured it out myself and corrected the electricians error. I would have figured it out long ago had I known it wasn't working. How frustrating all this has been! I figure my next step is going to be getting the sand filled in myself and suing the contractor/installer for the actual cost of the service contract he didn't provide,the cost of the materials and labor that I had to provide to complete the job he should have done in the first place.