Particular attention should be paid to filling the lower part of the joint, since this is the most responsible, while inconvenient for the work place. If the cement joint is performed in hot weather, the end of the tube entering the mouth and the inner surface of the bell must be moistened, otherwise the moisture from the cement will be absorbed by the PEX pipe and it will not be enough to cement hydration.
Cement joints shall be maintained in a wet condition until the cement has hardened, what they should be covered or burlap sacking and periodically watered. This is particularly important when laying pipes in shallow trenches dry. Fresh cement joints should be protected against mechanical shocks until they are completely hardened.
When laying PEX pipes in the wet soil is necessary to monitor the level of groundwater in the trench, as the flooding of fresh cement joints violating their integrity.
Professionals who are engaged in chasing PEX Plumbing system and plumbing pipes, recommend a way to pre-hydration, reduces shrinkage of the solution and provides good grip on the PEX pipe. For this moist mixture of Portland cement and clean sand in the ratio 1: 2,5 stirred and then allowed to stand for 45 minutes, then add water to get the consistency needed to complete the joint.
