How do you adjust a cistern siphon?

Disconnect water supply from inlet valve and remove cistern, remove old siphon, clean inside of cistern of any debris / dirt. REMOVE THE “LOCK” clip. Measure the height of the water level inside the cistern and adjust the height of the siphon (see picture). Fit the “LOCK” clip to lock the height of the siphon.

How does a toilet cistern Syphon work?

A toilet syphon uses a one way diaphragm to push water up and down a syphon tube. This creates the syphon which uses the weight of the water falling into the toilet to suck more water in from the cistern. The syphon is broken when the cistern is emptied. The problem with syphons is the one way diaphragm.

How to replace the diaphragm in a toilet cistern siphon?

Put back the locking washer. Add the spring. Replace the diaphragm in the siphon housing, and replace the coupling. Insert the siphon into the cistern, and replace the locking nut. Replace the cistern onto the toilet bowl, ensuring you have the sponge washer in place. Figure 20; sponge washer under the toilet cistern.

Why is the diaphragm in my cistern not working?

Often, the problem with a toilet not flushing properly lies in the cistern. The siphon, indicated in Figure 1, is normally at fault. It contains a washer, known as a diaphragm, which disintegrates with age and use. To replace it, follow these instructions carefully.

Why is the siphon in my toilet not working?

Often, the problem with a toilet not flushing properly lies in the cistern. The siphon, indicated in Figure 1, is normally at fault. Figure 1: Siphon inside a toilet cicstern It contains a washer, known as a diaphragm, which disintegrates with age and use. To replace it, follow these instructions carefully.

Why is the diaphragm in my toilet not working?

Often, the problem with a toilet not flushing properly lies in the cistern. The siphon, indicated in Figure 1, is normally at fault. It contains a washer, known as a diaphragm, which disintegrates with age and use. To replace it, follow these instructions carefully. First, switch off the cold water supply.