Inground Vs Aboveground Pool Filters – What is the Distinction?


Is there a giant distinction between filters for aboveground swimming pools and inground swimming pools? They each filter water proper? Apart from, the producer’s specs inform me that this filter can filter a swimming pool as much as 20,000 gallons.  So why ought to I’ve to pay greater than double the worth?  The quick reply is sure, however let’s not be penny sensible and pound silly. 

These are typical, cheap questions that many pool house owners ask.  Let’s take a look at a number of the main variations between filters for aboveground swimming pools and inground swimming pools.  However first we’ll take a look at the similarities.

The similarities between inground and aboveground pool filters are fairly easy.  The primary similarity is that there are 3 sorts of pool filters – Sand, Diatomaceous Earth (DE), and Cartridge.  The second similarity is that they work primarily the identical – a pump attracts water from the pool by way of the skimmer, then the water is pumped by way of the filter tank and its media (sand, DE or cartridge) and returns to the swimming pool clear and filtered.

The variations cope with pool plumbing or piping, obligatory move and eventually measurement.  Let’s focus on them so as.

Pool Plumbing. The largest distinction could look like pool measurement and gallonage.  However in actuality, it is extra of a perform of pool plumbing. Most aboveground swimming pools have their filter system proper subsequent to the swimming pool.  Plus, the filter and pump & motor are typically situated under the water stage. In different phrases, the filter system is often on the bottom with the hose from the skimmer feeding instantly down into the pump and the filtered water returning as much as the pool’s return jet – gravity feed.  Most aboveground swimming pools have not more than 6 to 9 toes (about 2 to three meters) of hose on both sides – a complete of 12 to 18 toes.

Inground swimming pools then again can and do have many extra toes of piping and plumbing.  On prime of that, there are often a number of skimmers or different suction traces – typically working in tandem, typically not.  Then there are a number of return fittings or “eyeballs” or jets.  This is an instance, my swimming pool (with solely about 16,000 gallons) has a skimmer, decrease suction, and a pair of return fittings.  Every wall becoming has its personal pluming line.  Despite the fact that the filter sits simply 15 toes from the pool, let us take a look at what number of toes of pipe there are for every line.  The skimmer and decrease suction are comparatively shut to one another, so that they every use about the identical quantity of piping – roughly 40 toes every line or a complete of 80 toes going into the pump.  The return fittings are on reverse sides of the pool.  One return line is about 30 toes from the filter, the opposite is about 50 toes – one other 80 toes.  My pump & motor has to tug and push water a complete of greater than 160 toes or TEN occasions the space of a median aboveground pool.  Plus we’ve not talked about heater, valves, elbows and different fittings utilized in inground swimming pools.

Vital Movement.  Understanding move is the “nice thriller” of the pool business.  Only a few folks apply it nicely.  Merely acknowledged, FLOW is placing the correct quantity of water by way of the system to adequately filter the water.  It isn’t all about Horsepower. In actual fact, most pool programs function with an excessive amount of horsepower!  And that is a waste of vitality and cash.  Consider it this fashion: all pipes or hoses (relying on their measurement or diameter) can solely deal with a certain quantity of water move – for example it is 100 gallons per minute (gpm) for instance.  You or pool man resolve {that a} new pump is required.  “Let’s use one thing somewhat greater that will provide you with ‘higher’ suction,” he says.  Now a pump is put in that pumps 125 gpm – nice!  Not so quick! Your pipes can solely deal with 100 gpm.  Do you’ve gotten higher suction? Possibly.  Are you utilizing extra vitality to run the bigger pump? Undoubtedly.  Roughly 25% extra vitality.  Not solely that, however the filter does not appear to filter in addition to earlier than.  That is as a result of the water is being pushed too rapidly by way of the media (very true of sand filters) – the filter system has to run longer as a result of the grime cannot be as simply trapped.

However that is only one a part of the move dialogue.  The opposite half is one thing referred to as “head.”  Head is how excessive the pump has to tug or push water up.  Most inground swimming pools have their filters above the water stage.  Generally inside a foot or two (lower than 1 meter).  Generally, it may be 10 to fifteen toes.  The pump has to attract all of that pool water 15 toes as much as the filter.  Consider this fashion: is it simpler to carry a glass of water over your head and pour it into your mouth or to make use of a straw to sip (suction) it?  Plus then there are photo voltaic heating panels (usually put in on the roof of the home or pool shed) and fountains or different water options.

Dimension. Lastly we come to measurement.  Pool measurement. Filter measurement.  It is all necessary.  Can an aboveground filter system filter 20,000 gallons of pool water? Sure. However is an aboveground filter system capable of correctly push water by way of 100 plus toes of piping and create sufficient circulation within the pool to push water down 6 or 8 toes in depth and again up once more?  Or how about doing all of that plus getting the water 25 to 30 toes in numerous instructions?  Inground pumps are made to do all of that pushing and pulling of water.  Aboveground pumps cannot.

How about filter measurement? Inground swimming pools usually have 20,000 to 40,000 gallons of water.  All of that water must be filtered 2 to three occasions each day for greatest efficiency (see our ezine article on Correct Circulation: “Circulation – First Key to Good Pool Care” for extra data).  A bigger filter is required for the bigger quantity of water.

As a obligatory apart, bigger aboveground swimming pools ( 27 ft spherical and bigger, and 18 x 33 oval and bigger ) ought to contemplate using a correctly sized inground filter system.  After the primary season, many giant aboveground swimming pools expertise water high quality issues on account of insufficient filter programs.  Sadly, these swimming pools are “hampered” by the issue of getting just one skimmer and one return cut-out.  Ask your native pool skilled to configure your system accurately.  Will it value extra initially? Sure, however you can be way more glad in years to return.


Source by Ronald Parrs