Sloan valve how does it work

Click here to view or read the article excerpt from the Sloan Maintenance Schedule Booklet below. Flushometers are strange looking pieces of engineering. Few people know how these essential fixtures of a restroom work, or what lies within their chrome plated exteriors.

There are two types of flushometers: piston type and diaphragm type. In this article, we will take you inside a Diaphragm Type Sloan Manual Flushometer to show you its various parts, and explain what those parts do. The heart of the flushometer is called the Diaphragm Assembly. Just lower the kit carefully onto the valve seat. The diaphragm assembly regulates the pressure inside the valve.

It is the change in pressure that causes the valve to flush when the handle is pulled. The assembly also controls the volume of the flush. Water sits inside two chambers in the valve body — the upper and lower chambers. When a flushometer is idle, the pressure in the upper chamber is greater than the pressure in the lower chamber due to its greater surface area. This keeps the diaphragm pushed down against the valve seat, and prevents any water from flowing down into the valve.

When the handle is pulled, a plunger inside the handle assembly pushes against the bottom part of the relief valve stem. This causes the relief valve to push the diaphragm up and release the pressure. As a result, the water in the chambers flows down into the valve and then into the toilet or urinal. The good thing is, when a control stop is no longer working, there will be tell-tale signs like the signs listed below in our troubleshooting control stops section.

One sign that a control stop is not fully opened is a unit that continuously runs. This occurs when a control stop does not open all the way when the unit is flushed, which then causes the water pressure to not be high enough for the diaphragm to function properly and reset.

This causes water to continuously run into the unit. To fix this, the control stop needs to adjusted so it can fully open as intended.

The diaphragm will also need to be replaced if the wrong sized diaphragm was initially installed. If the control stop on your flushometer no longer opens or closes all the way, then the control stop needs to be replaced. This is the most common reason why a control stop needs to be replaced.

It occurs for one of three reasons:. The image above illustrates how to open or close the stop valve. Control stops are fairly easy to adjust. Read the directions below to learn how to adjust a control stop in a flushometer. Follow the directions below to replace the control stop in your flushometer.

Solution: Replace the segment diaphragm to the proper position as instructed by markings on the diaphragm. Cause: The inside cover has been distorted from wear, freezing or abuse. Solution: Replace inside cover. Cause: The B seal is worn or deteriorated. Solution: Install new B seal. Cause: Handle gasket has been omitted. Cause: Valve Handle Bushing is worn. Solution: Install Sloan handle repair kit BA. Cause: Handle assembly is damaged.

Cause: Relief valve is damaged. Solution: Replace relief valve. Cause: Handle seal or handle assembly is damaged. Cause: Control stop is open wider than necessary. Solution: Adjust control stop for desired delivery of water volume.

Solution: Determine the required flush volume see label on valve or markings on fixture. Replace diaphragm assembly or relief valve for appropriate flush volume of fixture. Cause: Control stop is not open wide enough. Cause: Adjust control stop for desired delivery of water volume. Solution: Replace diaphragm assembly. Cause: Inadequate water volume or pressure is available from supply.

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