TOILET FLUSH PRODUCTS
Water Efficient Flushing Cisterns
Probably most frequently used toilet flush systems are flushing cisterns. These are separated in two main groups; bowl mounted and suspended.
Bowl mounted cisterns are placed on back-top of toilet bowl and are flushed by pushing a button or rotating an arm, all needed is to reach to it by hand and press. Flush act is done inside
by a push or pull system in joined with a refill and flush tubes. While inner flush systems are same, usage is different in suspended cisterns. They are flushed by pulling a chained trigger.
While a single chain suspended cistern cannot interrupt a flush, bowl mounted models are interruptible with an extra toilet flush button. There are also dual flush cisterns. Interruption and an extra flush
option gives user freedom of water saving. Highest quality inlet valves inside of VISAM 's flushing cisterns deliver optimum flush flow and do not leak.
For the concealed models, there is a broad range of flush plates compatible with your bathroom. Since cisterns are concealed in this type,
flush plate determines the cosmetic of your toilet flush. From dual flush to interruptible, from matt chrome to white, small or large , you can find
any type of flush plate in VISAM 's inventory.
Bowl Mounted Flushing Cistern
Push System (Flush Mechanisms)
Suspended Flushing Cistern
Visam tests all products to eliminate threat of toilet flush problems. Stressing all units to the limits, give
very good margin of time before any toilet flush repair is needed.
Strain and Torque Tests
- Inlet valve is mounted on cistern.
- 3/8" joint is strained under 75N, 1/2" joint is strained under 125N force equivalent weight for a minute which is more than enough for a single flush.
- 3/8" joint is put under 6Nm torque for a minute using a helper tool while 1/2" joint is tested for 10Nm torque for mimicing daily usage.
Backflow Prevention Tests
Water shortages makes the main water supply line pressure drops below ambient and flush water moves to main system and contaminates the supply line.
Preventing backflow keeps pipelines clean after water shortages.
- To simulate a water shortage, a mechanism applies drops pressure of one side of flush valve while cistern is full and mechanism is kept at same pressure for five seconds.
- Transparent pipe is checked for any remains of back flow.
Static Pressure Test
- Inlet mechanism is fed by 0.5 Bar pressurized water until it gets to closed position.
- Water level is recorded at equilibrium.
- After waiting five more minutes, pressure is increased to 3 Bar
- After another five minutes, new water level is recorded and the water level difference from previous pressure point is checked whether it crossed 20mm limit or not.
Dynamic Pressure Test
- Another pressure point of 6 Bar is added on top of static pressure test and checked if water level difference is lesser than 20mm between all pressure points.
Entrance Flow Rate Measurement
- Toilet cistern is filled with static pressure of 0.5 Bar and 3 Bar at discrete tests and filling timings are recorded versus supply pressure.
- For 0.5 Bar, flow rate must not drop under 3 Liter per minute.
- For 3 Bar supply, flow rate must not drop under 0.2 Liter per second.
Inlet Valve Reopening Test
- Flushing cistern is filled until float stops inlet valve flow.
- Water level is recorded after inlet stops.
- Water is discharged until water level decreases for 65 mm.
- Float and inlet valve is expected to start filling again at 65mm difference.
Crushing Water Test
- Inlet valve is tested with excessive amounts of water pressure.
- Cistern is filled at 5 Bar statşc pressure.
- When cistern is fully filled, inlet feed pressure is measured and expected to be under 2 Bar.
Measurement of Resistence Against Pressure
- Cistern is filled with 3 Bar static pressure.
- Float is held fixed after it stops inlet.
- Water pressure is gradually increased to 16 Bar.
- System is held at 16 Bar for five minutes.
- All parts are watched for any deformations or leaks.
- Float and intel system is bound to test cistern and fed with 1.5 Bar 15° C - 25 °C water until it fills cistern.
- Cistern water level is deliberately decreased by 65 mm.
- Inlet fills the cistern until float closes the circuit.
- After float & inlet is closed, it is held at closed position for an extra 15 seconds.
- Whole process is repeated for 25000 times and is done for another 25000 times with 8.5 Bar water pressure.
- Leak and reopening test are repeated after this test.
There are various acoustic tests done to keep the toilet flush quiet.