Abstract: For pressure testing a drain and vent piping system communicating with a tub opening having an anchoring structure a plug has a central, axially extending aperture therethrough. The plug has a resilient, compressible portion and is provided with inner and outer ends. An anchor is located at the inner end of the plug and extends axially beyond the inner end to engage with the anchoring structure and seal the tub opening. The test plug assembly also includes a threaded shaft that passes through the aperture in the plug and connects to the anchor. A manually operated threaded actuator is located at the outer end of the plug and is configured for threadingly engaging the shaft to draw the actuator towards the anchor and compress the compressible portion of the plug to block fluid flow through the bath tub opening and permit pressure testing of the drain and vent piping system.

Abstract: An inner and an outer body are clamped toward opposite faces of a tub wall over a tub overflow opening. Excess water flows from the tub through an overflow outlet water passage extending through the inner and outer bodies. A water inlet passage has an inlet in the outer body and a non-circular outlet in the inner body. Flow from the tub into the water supply is prevented by a check valve in the water inlet passage. An inlet water conditioning assembly is supported at the outlet of the water inlet passage to provide a smooth, controlled, laminar cascading flow into the tub. The inlet water conditioning assembly includes a flow straightener with parallel blades parallel to the flow direction dividing the total flow into segments that are reunited in a header region at the outlet of the flow straightener. A screen assembly downstream from the header region includes a number of wire mesh screen laminas each having a wire direction angularly offset from the wire direction of adjacent screens.

Abstract: For pressure testing a drain and vent piping system communicating with a tub opening having an anchoring structure a plug has a central, axially extending aperture therethrough. The plug has a resilient, compressible portion and is provided with inner and outer ends. An anchor is located at the inner end of the plug and extends axially beyond the inner end to engage with the anchoring structure and seal the tub opening. The test plug assembly also includes a threaded shaft that passes through the aperture in the plug and connects to the anchor. A manually operated threaded actuator is located at the outer end of the plug and is configured for threadingly engaging the shaft to draw the actuator towards the anchor and compress the compressible portion of the plug to block fluid flow through the bath tub opening and permit pressure testing of the drain and vent piping system.