Pool Equipment

When the pump is replaced, yes in most cases — federal efficiency rules mean nearly every in-ground replacement pump sold now is variable speed. It does not mean you have to tear out a single-speed pump that is still working. The rule bites at the point of replacement, and above-ground pools are treated differently. Worth knowing before yours fails, because a variable speed pump draws a fraction of the power at the low speeds it spends most of its time in.

It comes down to how far into spring and fall you want to swim. A heat pump moves warmth out of the outside air, so it loses efficiency as the air cools and struggles once temperatures sit in the mid-40s — which in Westchester is exactly April and October. A gas heater is indifferent to air temperature and raises water temperature far faster, which is why it suits shoulder-season swimming and anyone with an attached spa. If the pool is really only used in high summer, a heat pump is the cheaper thing to run.

Not quickly, but salt is worth planning around. At pool concentrations it is mild, yet over years it works on metal and porous stone — heater internals, stainless rails and ladders, and unsealed coping are where it usually shows first. It is entirely manageable: specify salt-rated equipment, keep the coping and deck stone sealed, and rinse the surround down. Because we look after the water and build the stonework around it, we can raise this at the point the two decisions are being made rather than after.

A pump that will not prime is almost always drawing air somewhere before the impeller rather than failing outright. Check the water level first — if it drops below about halfway up the skimmer mouth the pump pulls air. Then the lid o-ring, which dries out and shrinks, the pump and skimmer baskets, and the suction-side valves and fittings. Work through those before assuming the pump is dead, because a motor that hums and moves no water is usually a sealing problem, not a broken one.

Usually it means the cell cannot make chlorine at that moment, not that it has failed. The three ordinary causes are salt level drifting low, water too cold, and scale on the plates. Cold water catches people out here: most cells slow right down and eventually stop generating as water approaches roughly 60°F, so a flashing light in April or late October is often the system behaving correctly. Scale needs the cell cleaning. If it still flashes with salt in range, warm water and clean plates, the cell is near the end of its life.

It is worth checking before you buy rather than after. NYSERDA promotes two-speed and variable speed pumps to New York homeowners on the basis that they can roughly halve pump energy use, and utilities in the state run their own efficiency incentives. What is on offer, and who qualifies, changes from year to year — so check nyserda.ny.gov and your own utility for the current position instead of relying on last season’s figures.