Use silicone seal, plastic roofing cement, or pitch to reseal roof leaks. Your choice
will depend on the type of roofing material and the roof/hardware connection.
Roofing cement is available in tubes for use in caulking guns.
There are three ways to fix a leaking absorber plate. They are:
replace the entire collector
replace the absorber plate only
repair the absorber
Glycols and oils wilt burn when exposed to soldering torch flames.
Always drain the collectors before unsoldering joints! Before
heating the joints, remove the air vent to allow fluid vapors to escape.
As the joint comes apart, be prepared for a brief flare. Keep a fire
extinguisher with you- not down in the truck!
Replacing the collector is the easiest, but least likely method for repairing an
absorber plate. If the collectors are connected with unions, drain the collector loop
and remove the leaking collector. Dispose of used solar fluids in accordance with
If the collectors are soldered together, do not saw the inlet and outlet headers apart
without making sure you are not destroying the headers of adjacent collectors.
Also, the leaking absorber may be repaired and used as a spare, unless it has been
made useless by cutting off its headers.
If a coupling with a stop was used to connect the collectors, use a tubing cutter to
cut the coupling right at the stop. Remove the leaking collector. Heat and remove
the half-couplings left on the headers of the adjacent collectors. Use a heat shield
to protect header grommets. A swing-open escutcheon plate can be used as a
5.2 REPAIR PROCEDURES