Setting a Pool-Heater Expansion-Tank Pad Isolated From the Deck

Closed-loop pool heaters and some heat-pump retrofits pick up an expansion tank and an air separator that need a dead-level pad of their own. Setting that vessel on the walking deck puts a rust ring on the joints and a point load on bedding sand. PaverForge Hardscapes isolates the tank so a plumber can swap it without lifting a field of patio pavers.

Load, drip, and clearance

A charged tank is a concentrated load. We compact the base, use 80mm units, and keep the pad a full step away from the heater flue or fan discharge. The pad pitches to a drip edge. Isolation from the cage footer and from the heater skid keeps thermal growth from telegraphing a crack across the deck.

Sleeves before sand

Loop piping and a drain cock need sleeves through the pad, not a chase cut after polymeric sand has cured. We mark the plumber's rough-in, set sleeves, then sand and compact. If the heater is gas, the pad stays outside the flue setback instead of crowding the combustion opening.

Send the tank spec

A photo of the existing heater pad and the expansion-tank model is enough to size the field. PaverForge Hardscapes works Pinellas pool equipment pads from St. Pete Beach. Call 727-490-9798.