Watts 88004114 1 1/2 IN Lead Free Reduced Pressure Zone Backflow Preventer Assembly with Quarter Turn Shutoff Valves, Lever Handles, Backflow Flood Sensor

Both ends are 1-1/2 inch (40 mm) female NPT threaded, inlet and outlet. It is an inline body pattern, so it drops into a straight run of 1-1/2 inch threaded pipe with male-threaded nipples at each end. No flanged or grooved adapters are involved.

Yes. The LF009 88004114 is a reduced pressure zone assembly rated for health hazard (high hazard) protection, and it guards against both backpressure and backsiphonage. That is the combination a code official looks for on boiler makeup, irrigation with fertigation, and process water feeds. It is also rated for continuous pressure service, so it can sit under constant line pressure without cycling relief.

Go RPZ when the cross connection is a health hazard, which is what this Watts LF009 is built for. A double check assembly is limited to non-health-hazard (pollutant) applications. The tradeoff is the relief vent: an RPZ discharges water when it fouls or when the zone loses differential, so it needs a floor drain or an air gap drain fitting and cannot be installed in a pit. A double check has no relief port and no drain requirement. If your inspector calls for high hazard protection, the double check is not a legal substitute.

Maximum working pressure is 175 psi (12 bar), with a service temperature range of 33 to 180 degrees F (0.5 to 75 C). That covers domestic cold water and tempered lines. It is not built for hot or harsh water duty, so keep it off high-temperature process loops, and the 33 degree minimum means it must be protected from freezing in any exterior or unheated location.

Yes, the LF009 88004114 ships as a testable assembly with quarter turn ball valve shutoffs and lever handles on both the inlet and outlet. A certified tester isolates through those shutoffs and reads the test cocks, so no piping has to come apart for the yearly test. It is approved to the USC 9th Edition and carries a UL listing.

It monitors discharge from the relief valve so a nuisance or full-flow dump gets flagged instead of quietly flooding a mechanical room. That is the point of ordering this version rather than a plain LF009 assembly: RPZ relief discharge is the single most common source of water damage around a backflow installation, and the sensor gives you notice. You still need the relief port drained to a floor drain or air gap.

The body is lead free copper silicon alloy, cast, which is the LF designation in the LF009 series name. Internals use a silicone disc on an engineered plastic seat. That construction is what lets it go on potable domestic water service rather than fire or irrigation only.

No strainer is included with the 88004114, and there is no bypass line either. On an RPZ, debris on the check seats is the usual cause of nuisance relief discharge, so on older or dirty mains most installers add a wye strainer ahead of the inlet shutoff. Order it separately as a 1-1/2 inch NPT strainer to match the inlet.

It is UL Classified for the US but not for Canada. If the job is on the Canadian side, specify an assembly carrying the Canadian classification instead. For US work it is UL Listed and built to USC 9th Edition approval.

No. The 88004114 is a single inline assembly with no bypass and no meter. Any line served through it goes down while it is tested or rebuilt. If the building cannot lose water, pipe a parallel assembly or a bypass loop around it in the field, or specify an assembly furnished with an integral bypass.