A DE filter that keeps losing pressure (running 5+ PSI below normal) is typically starving for water, meaning there is a blockage or air leak on the suction side (before the pump).
All pools lose some water daily due to evaporation. Under normal conditions, expect about 1/4 inch per day, with weekly losses typically ranging up to 2 inches at most. However, factors like high temperatures, low humidity, wind, and pool activity can increase evaporation, leading to greater water loss.
A normal PSI for a D.E. (Diatomaceous Earth) filter typically ranges between 10 and 20 PSI, but there is no universal "normal" number. Normal pressure depends on your specific pool size, pump, and plumbing.
You should backwash a Diatomaceous Earth (DE) filter when the pressure gauge reads 8 to 10 PSI (pounds per square inch) higher than its normal, clean operating pressure. On average, this means backwashing every 4 to 6 weeks, though it will vary based on weather, debris levels, and usage.
Start by turning off the pump and inspecting the skimmer basket and pump strainer. Remove any debris and rinse the baskets thoroughly. This simple step can significantly improve pressure if blockages are the issue.
Pressure Spikes
When you see a gauge pointer bent, broken, or nicked, the gauge has likely been subjected to a sudden spike in system pressure caused by a pump cycling on/off or a valve being open/closed upstream. The pointer can be damaged from the force of hitting the stop pin.
After you've added the DE powder and the filter is running again, check for any leaks around the filter housing. Also, monitor the pressure gauge on the filter. If the pressure is still too high or fluctuating significantly, it may indicate a problem with the filter assembly or a need for further cleaning.
If you fail to rinse after backwashing, the overall quality of your pool water can decline. Backwashing a filter aims to remove contaminants, but if you fail to rinse the filter after backwashing, you are at risk of putting those same contaminants into your swimming pool.
When is it time to schedule a Diatomaceous Earth (D.E.) Filter Maintenance? The life expectancy of D.E. Filter Grids is 7-10 years. If you are experiencing any of the below issues, we recommend servicing your D.E. Filter.
Running a pool pump on 220V is generally better than 110V. While the pump will consume the exact same amount of electricity (watts) to run, 220V operation cuts the amperage draw in half. This results in less heat, reduced strain on your circuit breaker, and less voltage drop over long wire runs.
A 20 PSI reading on a pool filter is generally not too high, but it is at the high end of normal and likely indicates it is time to clean or backwash the filter. While a typical operating range is 10–20 PSI, pressure should be judged by a rise of 8–10 PSI above your clean baseline.
Backwashing flushes out the filter so it can keep doing its job, while waste pumping handles the extra debris and excess water that can throw everything out of balance.
How much water does my pool need to refill from evaporation? The average amount of water evaporation during the summer is approximately half of an inch loss per day. Multiplied by seven days, that's 3.5 inches per week. Use the calculation below to get a monthly estimate of the evaporation rate of your pool.
Baking soda (sodium bicarbonate) acts as a natural buffer that raises both your pool's total alkalinity and its pH. It prevents severe pH fluctuations (known as "pH bounce"), clears cloudy water, prevents equipment corrosion, and helps your chlorine sanitize more effectively.
In most climates, you'll need to add water once or twice a week during the swimming season. Adding water more often than that may indicate a leak, especially if your pool is losing more than ½ inch per day.
Pool pumps typically last 8 to 12 years, but premature failure usually stems from overheating, water leaks, or debris blockages. Common culprits include a failing motor (often due to worn bearings), electrical shorts, dry running caused by air leaks, and impeller damage from clogged debris.
With time the sand in your filtration system will break down into smaller particles and get out into the pool. These small particles will have no problem going through the filtration system and in the end, get mixed with dirt. This could be a reason your pool gets dirty even after you have vacuumed it.
A D.E. (diatomaceous earth) filter that constantly loses pressure usually indicates a restriction before the filter or a problem with the D.E. powder itself. A sudden pressure drop means water is struggling to reach the pump, resulting in less water pushing through the system.
The swimming pool water should be tested every week to avoid growing organisms that we never want to be on it. When the water becomes cloudy and green, that is an indication that the phosphate level is too high.
Pool shock is a chemical treatment that helps break down contaminants – such as leaves, dirt and debris, even oils from your skin -- that can gradually build up in your pool water. Shocking your pool as part of your weekly pool maintenance routine will help keep your water clear and balanced.
Most homes should have water pressure between 40 and 80 PSI. Less than 40 feels weak; more than 80 can cause trouble. If your pressure is over 80 PSI, you're at risk for leaks, noisy pipes, and appliance problems. If you see high numbers, you might need a regulator or a quick adjustment.
Pressure gauge failure can be attributed to one or more of these eight reasons: mechanical vibration, pulsation, extreme temperature, pressure spikes, overpressure, corrosion, clogging, and mishandling/abuse. Pressure gauges are an integral part of an application's warning system.
Think of it like checking produce at the grocery store. Using your thumb, press down on the tire's surface to get a feel for its pressure. The ideal pressure will have a small amount of give to it but will spring back quickly. Too much give, or not enough, means your tire's air pressure is off.