Equipment checks, repairs and replacement

Your pool stays crystal clear because the equipment behind the scenes is doing its job—moving water, filtering debris, sanitising and heating efficiently. Minor faults snowball into murky water, high power bills and costly breakdowns. Here’s Pool Life’s practical guide to what to check, what to fix, and when to replace so your system runs smoothly all year.

Safety first: Turn the power off at the isolator before touching equipment. Gas, hard-wired electrics and underwater lights must be serviced by a licensed technician/electrician.

The core trio: pump, filter, sanitiser

1) Pump

What to check (monthly):

• Prime & flow: Clear pump lid, full strainer basket, steady flow from returns.
• Pressure & noise: Compare to your “clean” baseline; listen for grinding or rattling.
• Leaks: Look for drips at unions and the shaft seal (water under the motor).

Common fixes:

• O-ring clean/lube or replacement
• New basket or pump lid
• Shaft-seal kit, union re-seal, impeller de-clog

Repair vs replace:

• Repair if the wet end is leaking or the impeller is jammed, but the motor is healthy.
• Replace/upgrade if the motor is noisy, overheating, or >7–10 years old—especially to a variable-speed pump (quieter, 50–70% lower running cost when set up right).

2) Filter (cartridge, sand, or DE)

What to check:

• Pressure rise: Backwash/rinse (sand/DE) or hose cartridges when pressure climbs 8–10 psi above clean.
• Media condition:
  • Cartridge pleats intact, end caps not cracked.
  • Sand: channelling or clumping means a deep clean or media change
  • DE: grids intact, no tears, correct DE charge after backwash
• Tank & clamp: Inspect for hairline cracks; confirm clamp band torque.

Typical lifespans:

• Cartridges: 2–3 years (more with good care)
• Sand: 5–7 years before media change
• DE grids: 5–10 years
• Filter tank: 10–15 years

Repair vs replace:

• Replace cartridges/media as they age.
• Replace the tank if cracked or if persistent bypass/clamp issues occur.

3) Sanitiser system (salt chlorinator or manual chlorine)

What to check:

• Salt level & output: Within manufacturer range; adjust output seasonally.
• Cell condition: Scale = reduced production—clean as directed (avoid over-acid washing).
• Power supply: Look for the “low salt”, “check cell”, or “no flow” lights; confirm the flow switch is operating correctly.

Fixes & decisions:

• New O-rings/gaskets, flow switch, or leads are straightforward.
• Salt cells typically last 3–7 years; replace when output drops and cleanings no longer help.
• If the control box keeps failing or is obsolete, consider a new unit rather than chasing intermittent faults.

Heating & comfort systems

Heat pumps

• Checks: Unobstructed airflow, clean evaporator coil, quiet compressor/fan, correct water flow.
• Symptoms: Poor heat rise, icing, error codes → call for diagnostic (refrigerant, sensors).
• Replace/upgrade if repairs exceed ~50% of a modern high-COP unit or the age is 10–15 years.

Gas heaters

• Checks: Venting clear, no soot, proper ignition, stable flame, good flow.
• Always use a licensed gas tech. Typical life 7–12 years.

Solar heating

• Checks: Manifold/roof leaks, actuator valves switching, controller working, adequate roof flow.
• Fixes: Replace brittle headers, perished tubing, or faulty actuators.

Cleaners, valves & fittings

Robotic cleaners

• Checks: Track wear, filter canister/bag cleanliness, cable twists, water ingress in body.
• Repair vs replace: Motors and controllers can be replaced; 4–6 years is a typical lifespan with regular care.

Suction/pressure cleaners

• Checks: Hose sections are airtight, diaphragms/gears are not worn, and there is correct flow via the regulator valve.

Valves & unions

• Routine: Lube O-rings twice a year, check for seeping. Replace perished handles/O-rings.
• Air leaks on the suction side cause pump cavitation and poor skimming—soap-test joints to find bubbles.

Lighting & electrical

• Pool lights: Water in the niche or frequent failures indicate seal or transformer issues. Upgrade to LED for long life and reduced power consumption.
• Controls & automation: Verify timer programs after daylight-saving changes; check Wi-Fi modules and sensor readings.
• RCD/GFCI: Test monthly; consult a licensed electrician if trips occur.

Leak checks (before you blame the equipment)

1. Bucket test: Compare the pool and a bucket of water to see if water drops over 24–48 hours with the pump on/off.
2. Dye test: At suspected cracks, fittings and light niches.
3. Pressure test: If the loss persists, a professional pressure test can isolate plumbing leaks.

Repair vs replace: a simple framework

• The 50% rule: If a repair costs more than 50% of a new, more efficient unit (and the old unit is past its mid-life), replace it.
• Energy upgrade rule: If upgrading (e.g., to variable-speed pump or LED) pays back within 2–4 years, replace.
• Reliability rule: Two major failures in 12 months? Replace and reset the clock with a fresh warranty.

Typical lifespans (guidance only):

• Pump/motor: 7–12 yrs
• Salt cell: 3–7 yrs; control box 5–10 yrs
• Filter tank: 10–15 yrs; media 2–7 yrs (type-dependent)
• Heat pump: 10–15 yrs; gas heater: 7–12 yrs
• Robotic cleaner: 4–6 yrs
• LED light/transformer: 7–10 yrs

Seasonal checklist (Pool Life quick list)

Pre-summer

• Service pump (seal, bearings check), set run times, confirm chlorinator output
• Baseline filter pressure after a thorough clean
• Inspect heater operation; verify solar/valve actuators
• Test lights and RCDs; update automation schedules

Pre-winter

• Shorten run time, keep chemistry balanced
• Clean and dry robots/hoses; store out of the sun
• Fit/inspect cover and check anchors/rollers

Smart upgrades that pay off

• Variable-speed pump: Run longer on low RPM for clearer water at a fraction of the energy.
• Oversized cartridge filter: Lower pressure, less cleaning, finer capture.
• LED lighting: Big energy and maintenance savings, better reliability.
• Automation & smart sensors: Stable chemistry and hands-off scheduling.
• Inline pre-filter or leaf canister: Protects the pump and reduces main filter load.

What Pool Life does on an equipment audit

• System inspection: Pump, filter, sanitiser, heater, valves, plumbing, lights and controls.
• Performance testing: Flow, pressure baseline, prime/air-leak checks, chlorinator output verification.
• Leak screening: Bucket/dye test, recommendations for pressure testing if needed.
• Maintenance & minor fixes: O-rings, lube, seal/basket replacements, filter cleans, cell descale.
• Repair/replace options: Clear quotes, lifecycle and energy comparisons, warranty guidance.
• Handover: Optimised run times, maintenance schedule and a simple owner checklist.