* To avoid leakage possibility, when you used the original one ( with plugs ) for a long time, the plugs would be loosed day by day, and then leakage occurred would be easily. There's no problem if use our Retainerless Check Valves.
* It's a design that all internals to be assembled from the downstream side without any potential leak pass to the atmosphere.
* No Screw Body Plugs.
* Emmissions free design.
* Installation precaution will be shown on the each packed valves.
* Installation Dimensions please refer to Terofox Dual plate Check Brochure page 21 ~ 25. * API594 Design or Manufacturer Standard.