Where in existing house installations a hose pipe is to be used from an existing hose union tap located outside a house and which is not provided with backflow protection, either:
a. | the existing hose union tap should be provided with a double check valve (Type EC or ED) located inside the building; or |
b. | the tap should be replaced with a hose union tap that incorporates a double check valve (type (HUK1); or |
c. | a hose union backflow prevention (Type HA) or a double check valve (Type EC or ED) should be continuously fitted to the outlet of the tap; or |
d. | is legally installed in any premises. |
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