Se Habla Español

E Parlato Italiano



What power supply do I need?

Current year model electronic heaters are dual voltage and can operate on 120VAC OR 240VAC. Millivolt heaters do not require an external power supply. ABG heaters require 120V ONLY.


NOTE: Gas fired heaters should be diagnosed and repaired by trained personnel. 


Back to top


How large of a heater do I need?

Recommended H-Series Heaters for Swimming Pools.


Heater Model

Pool Surface Area



Determine the pool surface area by multiplying the length of the pool in feet by the width. Use the chart above to determine the heater size for your pool.


A note about heater size: A pool heater should heat the pool, on average, one degree an hour. Once the heater is sized to the pool, stepping up one or two sizes will decrease the time to heat.


CAUTION: If you are replacing an existing heater, the new heater size is limited by the diameter of the existing gas supply pipe. Gas pipe is sized according to BTU’s required. Installing a larger heater than the existing pipe can supply will result in a sporadic or non-operating heater.


Back to top


Why is there sand at the bottom of my pool?

The sand you are using could be too small.  Sand that is too small can travel through the laterals in the bottom of your filter and back to the pool.  #20 silica sand, .45-.55mm in size, is required.  This can be obtained at your local Hayward dealer.


Prior to adding sand, remember to always remove a lateral (it unthreads) from the lateral assembly at the bottom of the filter.  Try putting some of the sand you are going to add inside the lateral.  Other than debris sand (fines), 99% of the sand should stay inside the lateral.  If most of the sand comes through the holes of the lateral, the sand is too small.Your pump may be too large or the sand level too high in the filter.  When the filter is backwashing the water flow can cause the sand to rise high enough and overflow into the standpipe, which will allow the sand back into the pool.Refer to the Hayward owners guide or the filter label for the correct amount of sand for your filter.


Back to top


Why is dirt/sand passing through my sand filter?

A lateral could be cracked or broken, the multiport valve may need servicing, or air may be passing through the filter, causing a channeling effect, which permits dirt to get by the filter.


There may be a broken or cracked lateral located on the manifold of your filter.  You will need to inspect these laterals and replace them if necessary.


Back to top


When do I need to replace my sand?

On average, sand should be replaced every 3-5 years. This may be longer if the pool stays clear, or shorter, if the filter runs all the time. The jagged edges of the sand wear down and become smooth as the sand ages. When this happens the sand can no longer trap debris particles and dirt can pass through the sand and back into the pool.


If the pool is chemically balanced, the system is running the proper length of time and the bather load is normal, but the water will not clear, even using a flocculant or clarifier, then the sand needs changing.


As the sand ages, it may start to clump and the water flow can form channels in the sand, allowing the debris to pass through. Channeling is often seen when the pump horsepower is too large and wants to move too much water through the filter.


Back to top


Why is my pump running hot and powering off?

This may be caused by insufficient power due to an undersized wire or a poor connection.  Check your owner’s manual for proper wiring.


Your local power company might be experiencing a power drop especially during a heat wave.  Restart your pump when the weather cools to confirm that the problem is really in the motor.


Your pump has a thermal overload, which will shut the motor off when it gets too hot—it will restart once it has cooled down.  Check the air intake vents of your motor to ensure they are free of debris.  If debris is blocking these vents, it will cause the motor to run hot and possibly shut down.


Make sure your pump is located in an area with adequate drainage.  Flooding from rain and other sources could cause a pump to run hot and cut off. 


Back to top


How do I winterize my pump?

To winterize a Hayward Pool pump, turn off the electrical circuit breaker that supplies power to the pump. Also, make sure that there is NO water left inside the pump. All Hayward pumps are equipped with drain plugs that will allow excess water to drain once the plugs are removed. Contact your local Hayward dealer for proper winterization procedures.


Back to top


How many hours per day should I run my pump?

There are many factors to consider; bather load, gallons of water, pump horsepower, type and size of filter just to name a few. A good guideline is 8-10 hours a day. On the cooler days and early and late season, you can cut the run time down to 4-6 hours because there is usually less swimmers and cooler water requires less chemicals. In peak season, when it is the hottest, raising the run time to 10-12 hours per day will help to keep the pool clean and circulating during it’s time of heaviest use.


Back to top


How can I save on my heating costs?

The best way to save on pool heating costs is to obtain a thermal barrier. Most of a pool’s heat is lost during the evening, through evaporation. By using a solar cover or other thermal barrier, less heat is lost and less gas is needed to bring the pool back to desired temperature.


NOTE: Gas fired heaters should be diagnosed and repaired by trained personnel. 


Back to top


I have a large pool pump; do I have to have a flow meter for the heat pump?

Hayward heat pumps have a flow rate range of 30 to 70 GPM, with an optimum flow rate of 45 GPM. If your pump is capable of significantly more flow than this, a flow meter is recommended to insure the flow rate is within the prescribed range.


Back to top


Will a heat pump heat a spa during the winter?

Heat pumps derive their heat from the air. There is enough usable heat for a Hayward heat pump to operate, efficiently, down to around 45° Fahrenheit. However, there may not be enough heat available to keep your pool or spa as warm as you would like. If your winter temperatures normally drop below 50°, a heat pump would not be a viable option for heating through the winter.  


Back to top


What is the difference between heating with gas and a heat pump?

With gas heat, gas is burned and generates heat to heat your pool. With a heat pump, heat is transferred from the surrounding air to the pool water. Gas heaters can operate in almost any climate, and at almost any time of the year. Heat pumps must have heat available in the air before they can heat the pool. Heat pumps are designed to maintain consistent pool temperatures throughout the normal swim season.


Back to top


Why does my pressure gauge never move?

The pressure gauge will show a reading when water passes through the valve or filter, depending on the gauge’s location.  If the gauge remains at zero or stays at the same pressure, whether the pump is operating or not, the gauge is broken and needs to be replaced.


Back to top


Why is there water leaking from the backwash/waste line while I am filtering the pool?

At the bottom of the valve is a spider gasket. This gasket seals against the valve body to divide the ports. Depending on the placement of the handle, each port is designed to direct the water flow in the appropriate direction. If the gasket swells, or becomes unseated from the channel, the water will flow in various directions. The gasket can be replaced in some models or the entire key/stem assembly will need to be replaced.


Back to top