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test connection on wet pipe system

Question asked by josephaclaros on Jun 25, 2018
Latest reply on Jun 25, 2018 by zacsp3374

Do i really need to change all the pipe line, sight glass and test valve from 1" to 1/2"? the reason is the "insurer" said that we need to change all the current set-up of existing test connection which is 1" for the test line and 1-1/4" for the drain line, because the size of the existing sprinkler heads is 1/2". Is the insurer is correct? please refer to below references

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