It just so happens that one gallon of chlorine, 12% trade grade (pool grade bleach, the stuff that you buy at a distributor) contains one pound of chlorine. In the pool industry, one part per million represents one pound of chemical per 120,000 gallons of water. One gallon of water weighs about 8.33 pounds, so 1 million pounds of water is 120,000 gallons. However, we do not use pounds to measure water we use gallons. It’s a weight ratio: one pound of chemical per 1 million pounds of water. We use this ratio to tell us the amount of a chemical in the pool compared to the amount of water we have in the pool. So what exactly is PPM? It’s a ratio such as 1 percent is a ratio of one in a hundred. It’s the unit of measure that we use for the amount of chlorine, alkalinity, salt, TDS, cyanuric acid, and so on. We usually recommend an increase of 1 - 1 1/2 degree per hour.As pool service guys, we use the term parts per million several times a day when checking the chemical parameters of a swimming pool. Heat rise will vary slightly when dealing with different heaters. Decide on the temperature rise you want per hour Then consult this chart. The Surface area will help determine the BTU size of your pool heater. Round = 1 ½ HP pumpĭetermine the BTU Size for Swimming Pool Heaters You can use the following as a guideline. A simple rule to follow is you should be able to clear all of the gallons of your pool in an 8 hour period of time. The gallons found inside your pool will give you the horse power needed for your pump. The size of your system is mostly determined on the size of your above ground pool. The Size of the Above Ground Pump and Filter System The size of the filter that could handle the 58 GPM Super Pump would be the C7512.
#Pool math calculator plus#
If we were to choose the Hayward Star Clear Plus as our chosen filter we would use the chart found on the description page In the example above we were using the Hayward Super pump that produces a 58 GPM at 30 feet of Head. This designed flow rate should be higher than the size of your GPM your pool pump produces. The most important factor of the size of the Swimming Pool Filter is the GPM your Pool Pump produces. With 30 feet of head and 46.7 GPH we would use the SP2605X7 (always go to the higher size GPH, 58 in the example). N ext look at the chart listed on Hayward Super pump description page (see below) Let's say you choose the popular Hayward Super Pump and you have found your total return piping to be a total of 30 feet. Now that you have your GPM, we need to make a couple more assumptions.
The Feet of Head.įor example, if you have a 20,000 Gallon pool. These charts are usually shown with the GPM vs. Many of the Swimming pool pumps will have charts showing the Horse Power of each pump. The total amount of return piping should give you a good idea on how many feet of head your pump will have. A good estimate is to take the amount of feet from where your suction lines are (skimmers or main drain) back to where your pump will be located. Now that you have the ideal GPM you need to figure out the Feet of head of your pump.
Gallons = Length x Width x Average Depth x 7.5 The gallons of water depends on the shape of your pool. Pool Shapeĭetermining the gallons of water in your swimming pool can help determine such thing as the size of your pump and filter.
The surface area of a swimming pool can help determine the BTU size of pool heaters.
The Size of your Inground Swimming Pool Filter.The Horse Power Size of your Inground Swimming Pool Pump.The Gallons of Water in your Swimming Pool.Please select from the following calculations. Below are a few calculations that may help determine the size of your swimming pool, heater, filter, or many other products. When purchasing a new swimming pool or swimming pool product there are several calculations that can be helpful.
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