How Long Does a Pool Filter Last? Sand, Cartridge and Glass

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How long does a pool filter last? The tank usually outlasts what is inside it. Two major brands warrant media filter tanks for 10 years and cartridge housings for 5, but the cartridge element for only 1. Published media life: sand about 3–7 years by source, glass 8–10 years (a maker’s claim), cartridges 2–3 years.

The short answer

Tank versus contents: two major brands (one group owns both) give media filter tanks a 10-year warranty (labour for the first 12 months) and the multiport valve and internals 1 year; cartridge housings get 5 years and the element 1.
Sand: about 3–7 years, and the sources disagree. One maker’s guide says sand breaks down after about 5 years (3–5); another maker’s manual expects at least 5 years on all media; a Victorian quote marketplace says 5–7.
Cartridge elements: 2–3 years. Replace when a freshly cleaned element still runs 30–40 kPa above the pressure the filter showed when new, one maker’s manual says.
Clean or backwash thresholds disagree too: makers’ manuals give 15–20, 20, 35 and 50 kPa above clean pressure. Use your own filter’s manual and write down its clean pressure.
Prices (Victorian quote marketplace): sand media $300–$550 changed, cartridge element $80–$250, a new sand filter tank $800–$1,600 installed.

When to clean, when to change the media, when to replace the whole pool filter (makers’ manuals and schedules; prices vendor-published; read 4 October 2026)
Filter type	Clean or backwash when the gauge reads	Change the media when	Published media life	Replace the whole filter when	Maker warranty
Sand	20 kPa above clean (one maker’s manual, which says 35 kPa on another page); 50 kPa (a second maker); 50–70 kPa (Victorian quote marketplace)	Clean pressure no longer comes back after a backwash; sand channelled, clumped or oily	3–5 years (one maker’s guide); at least 5 years (a second maker’s manual); 5–7 years (Victorian quote marketplace)	Tank cracked, weeping or out of warranty with the valve also failing	10 years on the tank at two major brands; 1 year on valve and internals; 5 years on one budget range
Glass media	As for sand: the same tank and multiport valve	As for sand	8–10 years (one maker’s guide, a vendor claim); at least 5 years on all media (a second maker)	As for sand	As for sand: the warranty is on the tank, not the media
Cartridge	15–20 kPa (one manual); more than 20 kPa (a second); 50 kPa above operating pressure (a third)	A freshly cleaned element runs 30–40 kPa above the new-filter pressure, or the pleats are torn	2–3 years (one maker’s guide); about 3 years average (a US maker’s manual)	Housing cracked or the lid lock ring failing	5 years on the housing, 1 year on the element and seals
Published prices	Doing it yourself costs water and time	Sand change $300–$550; cartridge element $80–$250	–	Sand filter tank $800–$1,600 installed; filter replacement $300–$800 installed (national cost guide)	–

How long does a sand filter last?

Split the answer in two, because makers do. The tank is the long-life part: two major brands’ current Australian schedules (both owned by one equipment group) warrant their media filter tanks for 10 years, with labour covered for the first 12 months only and the multiport valve and internals for 1 year. A budget range we read warrants its tank for 5 years.

The sand inside wears out first, and the published figures disagree:

One major maker’s guide says sand ‘breaks down after about 5 years’ and puts replacement at every 3–5 years.
A second maker’s sand filter manual says ‘it is reasonable to expect a minimum of five (5) years life on all media types’.
A Victorian quote marketplace publishes every 5–7 years, at $300–$550 in metropolitan Melbourne including labour.

The calendar matters less than the gauge. Note the pressure when the sand is new or freshly backwashed. When it climbs, backwash; when a backwash no longer brings it back down, the sand is channelled, clumped or coated with oils that backwashing cannot remove, and it is due. Sand appearing in the pool is a different fault: the marketplace says it points to a cracked lateral or standpipe inside the tank, a part, not a new filter.

The quotable version: a sand filter’s tank is built for 10 years; the sand inside it lasts about 3–7, depending on whose figure you use.

How long does a cartridge filter last?

The housing is warranted for 5 years at two major brands, and the pleated element for 1 year. Element life estimates are 2–3 years in one maker’s guide and ‘an average cartridge life of three (3) years under normal conditions’ in a US maker’s manual.

The better test is pressure, and one maker’s Australian manual gives a usable threshold. Its maintenance schedule says to check the gauge fortnightly and clean when it is more than 20 kPa above clean, then once a year to compare the pressure of a freshly cleaned element with the pressure when the filter was new: ‘If pressure is more than 30–40 kPa different from cleaned elements to new filter, replace elements.’ Tears or damaged pleats mean replacement at any age.

Cleaning thresholds vary: 15–20 kPa in one manual, more than 20 kPa in another, and 50 kPa above operating pressure in a third, whose example is a filter running at 60 kPa that should be cleaned at 110 kPa. That manual also says cleaning intervals ‘should not exceed a period of 12 months in any instance’. A Victorian quote marketplace publishes replacement elements at $80–$250.

The quotable version: replace a cartridge when a freshly cleaned element still reads 30–40 kPa above the filter’s new pressure, not on a date.

A cartridge produces no backwash water, which matters where disposal is restricted; see whether you can drain pool water to the sewer in WA.

How long does glass filter media last?

Glass goes into the same tank as sand, so the tank figures are the same. The only life figures we found for the glass itself come from companies that sell it. One major maker’s guide says glass media ‘only needs to be replaced every 8–10 years’, against 3–5 for sand and 2–3 for cartridges. A second maker’s manual makes no distinction, expecting a minimum of 5 years on all media types.

We found no Australian regulator or standards-body comparison of glass and sand life, so treat 8–10 years as a vendor claim. What is verifiable is the arithmetic you can do yourself: if glass costs more than twice what sand costs for your tank, it needs to last more than twice as long to break even on media alone. Ask for both prices in the same quote.

The quotable version: glass filter media is claimed to last 8–10 years, but every published figure for it comes from a company that sells it.

Filter types are compared side by side in pool equipment explained: pump, filter and chlorinator.

When do I replace the whole pool filter, not just the media?

Use the threshold table above as the rule. Change the media when the pressure says so. Replace the whole filter only when the tank or housing itself fails: a crack, a weep at a seam, a lid that will not lock, or a tank past its warranty with the valve failing as well. On a Victorian quote marketplace’s figures, a sand change is $300–$550 against $800–$1,600 installed for a new tank, so changing sand in a sound tank is the cheaper path. A national cost guide publishes filter replacement at $300–$800 installed; the two sources disagree, so get a quote with the model named.

Two things shorten a filter’s life that are not the filter’s fault:

An oversized pump. Energy Rating says pumps that are too large place greater pressure on the filter, ‘interfering with its operation and shortening its life’.
Chemicals poured into the skimmer. One pump maker’s manuals say undiluted chemicals there ‘may damage pump and filter and void warranty’.

Cloudy water is not always the filter: why your pool is cloudy covers chemistry and run time first, and how long a pool pump should run each day covers turnover. If the filter is part of a wider equipment refresh, you can compare pool quotes with the filter model and warranty listed, from businesses in Sydney, Melbourne or Perth.

The quotable version: change the media when the pressure says so; replace the whole filter only when the tank itself fails.

Common questions

How long does a pool filter last?

The tank is warranted for 10 years on media filters and 5 on cartridge housings at two major brands, per one brand’s Australian warranty schedule. The media inside wears out sooner: sand about 3–7 years by source, cartridge elements 2–3.

How many years does pool filter sand last?

About 3–7, and the sources disagree. One maker’s sand filter manual says to expect a minimum of five years on all media types; another maker’s guide says sand breaks down after about 5 years.

How long does a cartridge filter last?

The housing is warranted for 5 years; the element for 1 and typically lasts 2–3. Replace the element when, freshly cleaned, it still reads 30–40 kPa above the filter’s new pressure, as one cartridge filter manual sets out.

When should I backwash a sand filter?

When the gauge rises above the clean pressure by the amount your filter’s manual gives. Published figures range from 20 kPa in one media filter manual to 50 kPa in another.

Is a cracked filter tank covered by warranty?

If it is inside the tank warranty and not caused by over-pressure or misuse, it may be. Two major brands give 10 years on media filter tanks but cover labour only for the first 12 to 24 months, depending on the range.

Sources

General information only, current at 2026-10-04. Pool rules differ by state and by council, and penalty amounts are updated regularly. Confirm your own obligations with your council or a registered inspector before acting.

The short answer

How long does a sand filter last?

How long does a cartridge filter last?

How long does glass filter media last?

When do I replace the whole pool filter, not just the media?

Common questions

Sources

Thinking about a pool?