There will be some water coming out of the valve side port during operation, even when the relief valve is not engaged.It is the inspection to ensure quality before leaving the factory.Does not affect performance Our values are tested before leaving the factory. If after a period of use, water cannot be sprayed, you can remove the gear to check if anything is stuck.After removing the debris, you can use it normally Our value is also suitable in a salt water pool.Easy to install, salt water swimming pool is also suitable. The white material will appear a little yellow when used for a long time, please know that Our G52 backup valve includes a G53 gear mechanism inside, not just a housing In order to better ensure the quality of our products, our products will be tested before leaving the factory, so they will carry water, but it does not affect the useplease don't worry