Search results

The OP may be talking about the flap at the bottom of the skimmer float where you can control flow. It isn't really a diverter and will not completely stop flow from the skimmer. Also, that may not be a relevant test anyway if the MD is plumbed through the skimmer as it is difficult to...

Manufacture's published efficiency numbers are under specific operating conditions (water temp, air temp, sky temp, etc) which are almost never typical. The efficiency numbers in the model are calculated for the actual conditions specified in the model so tend to be more accurate than the...

If you can hand tighten a little more, that might help. Just be cautious of using too much torque. Is there a union or threaded pipe on the front of the pump? Those can leak as well.

No, it probably would not help the air problem. Plus check valves are on a lot pools including mine and they do not cause air issues unless they are on the suction side and the o-ring leaks. In fact, even though the valve looks partially closed, the head loss is not really that much worse than...

That is exactly how one should expect a check valve to behave. The opening width of the valve is dependent on the incident water velocity on the valve paddle. My check valve is barely open on low and about half open on high. Do you have solar? If so, then it is necessary to prevent backflow...

The only real downside to a larger filter is up front cost. It might take longer to clean but you clean less often too which to me is a better trade off. However, given your location and the fact that you close the pool for several months out of the year, you might not really need that large...

Because as I pointed out earlier, when you restrict the suction side of the pump, the pressured drops (i.e. goes more negative) so it increases the relative pressure between the atmosphere (outside of pump) and the pump basket interior so the seals have to work harder to keep air out. Any seal...

When you see air in the pump basket as the video shows, that is an air leak. Cavitation is something you can hear but not usually see because in occurs inside the impeller out of sight. In this case, both may be happening but either way it is due to the restriction caused by closing off the...

The pump basket not filling during priming phase is usually caused by one of several things. Suction side air leak Impeller Clog Return side blockage (filter or other) Having a small single suction line can increase suction side head loss and decrease pressure in the pump basket making it more...

More likely is an air leak and/or pump cavitation. Does it sound like gravel passing through the pump? If so, that is cavitation and occurs when there is too much head loss in the plumbing before the pump. If what you are experiencing is an air leak, that can be fixed by finding out where the...

Insolation Data: https://www.builditsolar.com/References/SolRad/Lat48.htm Right now for your location, incident energy is around 2200 BTU/sq-ft/day on average, depending on the angle of the panels. For 480sq-ft panel area, that is about 1M BTU/day but panel efficiency is not included. If one...

The pump display shows cavitation: Although it really doesn't sound like cavitation. It sounds more like there is an obstruction in the impeller but you may need to take apart the pump to find it. Going through the pump basket only finds debris in the inlet but the obstruction could be in the...

If you use a pump like this...

Most pressure washer require a flooded suction (i.e. positive pressure) so that doesn't seem like a good solution to me for direct suction from the cover to the garden. Because of the above limitation of pressure washers, this would only work if drawing from the bottom of barrels but pressure...

In the past, I have used 12mil, 8 mil & 5mil without a noticeable difference in lifespan but a huge difference in handling. I also found that the lighter cover is less likely to snag or drag over the coping and rip.

Offset plumbing curves actually can account for that but most pools do not have 5' of static head. Also, that only applies when water is returned at a different elevation like for a waterfall. With a suction port at or below water level and the returns at or below water level, there is no static...

The issue at lower flow rates is usually caused by spring loaded valve such as those in check valves and heater bypass valves. The valve opening is determined by the water velocity and the lower the velocity, the smaller the valve opening which changes the plumbing curve (i.e. moves it to the...

The larger cell is usually a better deal economically because the T-15 will last longer. The T-9 would have to be less than 60% of the T-15 cost to make it worthwhile but that does not include any extra pump runtime either. Hayward SWCG Cell Specifications CELL GALLONS LBS/DAY LIFETIME CL...

Yes it does and is included in the charts I posted.

Yes, the drive electronics are included. The data I am using is from Energy Star measurements: https://www.energystar.gov/productfinder/product/certified-pool-pumps/results Where did you get your data from? I believe that all pump manufactures including Pentair include the drive electronics...

Why do you say that? For the OPs plumbing setup power at 2200 RPM (44 GPM) should be about 475 watts (EF=5.6) while power at 1400 RPM (18 GPM) should be about 131 watts (EF=8.2) so significantly better.

Here are a few: Leq is the equivalent length in feet of 2" pipe.

Those are much less that what you see in typical equivalent length tables. This table comes closest to the simulations that I ran: https://www.engineeringtoolbox.com/pvc-pipes-equivalent-length-fittings-d_801.html