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Net’Skim disposable skimmer pre-filter bags

Here you will find the Net’Skim range: disposable pre-filter bags that sit inside the skimmer and catch debris before it ever reaches the basket, the suction line and the pump strainer. They are a simple, consumable item rather than a piece of equipment, and they are usually bought by the box and kept in the pump room alongside spare seals and test strips. The box of 12 under reference 7002207 is the format listed on this page.

What a skimmer pre-filter bag does

Everything that floats on the surface of a pool ends up at the skimmer: leaves, blossom, pine needles, grass clippings, insects, suncream residue, hair and the fine dust that blows in on a dry day. The skimmer basket stops the larger items, but the finer material passes straight through the perforations and travels on to the pump strainer basket and then to the filter media. Over a season that fine load is what shortens the interval between backwashes, clogs sand and glass media, and leaves a greasy film on cartridge pleats.

A pre-filter bag is a fine mesh sleeve fitted over or inside the skimmer basket so the water passes through the mesh before it reaches the suction line. The result is that debris is removed at the first point in the circuit, where it is easiest to reach, instead of being pushed deeper into the system. Benefits that follow from that are practical rather than dramatic:

  • Cleaner pump strainer — less material reaching the strainer pot, so the lid is opened less often.
  • Less loading on the filter — fine particles are intercepted before they bed into sand, glass or cartridge pleats.
  • Easier emptying — the bag is lifted out complete and discarded, rather than tipping a wet basket out by hand.
  • Useful in specific seasons — autumn leaf fall, spring pollen and the days after a storm are when a pre-filter earns its place.

What is in the range

The listing here is the Net’Skim® disposable skimmer pre-filter bags, supplied as a box of 12 under part number 7002207. One box therefore covers a dozen changes, which for many pools is a full season of routine use or a few intensive weeks during leaf fall. Because the bags are disposable, there is nothing to clean, dry or store between uses, and no mesh basket to brush out.

When ordering repeat supplies, quote the reference 7002207 rather than a description. Pre-filter bags from different makers vary in mesh, in the way they are retained and in the basket shape they suit, so a part number is the quickest way to make sure the same item arrives again.

Checking the fit before you order

Skimmers are not standardised across manufacturers, so it is worth spending two minutes with the lid off before buying a box of anything. A few checks make the choice straightforward:

  • Measure the basket — note the diameter across the top rim and the overall depth, in centimetres, with the basket out of the skimmer.
  • Look at the rim — a basket with a pronounced lip or a moulded handle gives a bag something to sit over and hold onto.
  • Check the clearance — there must be room above the basket for the folded top of the bag without fouling the skimmer lid or a float valve.
  • Note the skimmer type — built-in skimmers in liner and concrete pools, above-ground wall skimmers and in-line units all behave differently.
  • Watch the water level — a pre-filter adds a little resistance, so keep the level correct and the weir door free.

Getting the most from each bag

Fit the bag with the pump off, seat it evenly so the mesh is not pinched between basket and skimmer wall, and refit the basket normally. Change it as soon as it looks loaded rather than waiting for the flow to drop: a blocked pre-filter starves the pump in exactly the same way as a blocked basket, and a pump running dry is a far more expensive problem than a bag. During heavy leaf fall, daily changes are normal; in settled summer weather a bag may last considerably longer. If the pool is being closed or the circulation shut down, remove the bag rather than leaving wet debris sitting in the skimmer.

Net’Skim at PoolParthub.com

Here we list the Net’Skim disposable skimmer pre-filter bags in the box of 12 format, reference 7002207, so that the item can be reordered by part number as a routine consumable rather than searched for again each season.

It sits alongside the other skimmer parts on the site — baskets, weir doors, lids and seals — so a skimmer can be brought back to full working order and kept that way with a single order.