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I was very pleased to even find a mercury switch for such an ancient boiler: the first ones came out in the 1970s, I believe. My customer maintains that he cannot afford a new boiler installation --- The "regs" require you to upgrade the piprwork etc to "current standards" if you do have a new unit. His pipework is an inaccessible mess --- So, an expensive repleacement! My customer was pleased!
Verified purchase: Yes | Condition: Pre-owned
Not cheap but the whole package of valve, mercury vapour switch and refurbishment made it good value
Verified purchase: Yes | Condition: Pre-owned
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