Pool Heating With 25 m2 of collectors, the swimming season is prolonged by about a month at either end. ... Maintenance Leakages A few months after the initial commissioning, a leak developed at one silver-soldered joint, where a collector tube meets the header. The front cover was removed, the joint cleaned and repaired with two-part epoxy compound, in situ, without complete dismantling. Duringanbsp;...