The cistern is one of the oldest sanitary facilities in the home. picture 1 shows the principle of operation: by chain hoist, which initiates the rinsing process, becomes a porcelain bell (formerly made of lead) raised, whereupon some of the water in the box falls through the recesses in the bell guide tube into the flushing pipe. After releasing the chain hoist, the water in the flushing pipe creates a negative pressure; the atmospheric air pressure pushes the remaining water in the box through the cavity of the bell, thus ending the rinsing of the basin.
Meanwhile, the filling process of the cistern is already beginning, that of the float - formerly a closed sphere, today a PVC bell – is terminated when the predetermined water level is reached. picture 2 shows the cistern design in plan view, as it is currently installed in residential construction.
Cisterns are generally functional for many years. If the case occurs after prolonged use, that the water is constantly running into the pool, then the following causes come into question:
The bell is tilted on the bottom valve
■ possibly. get a new special seal (picture 3)
picture 4 with the porcelain bell removed, demonstrates the position of the riser at the moment the chain hoist is operated. The special rubber seal must be in the closed position (1) hermetically the bottom valve (2) seal. So it has to be checked first, whether the bell has caught its suspension eyelet on the towing device, so that it no longer rests vertically on the bottom valve, or whether the special rubber seal has hardened over time and has to be replaced with a new one.
Float no longer regulates reliably
causes: Float rod is bent; Float locking screw has loosened; water has gotten under the float bell.
According to the picture, the float on the pole must be regulated in this way, that it closes the inlet valve when a certain amount of water is reached. Is this closing process set to "too late"., the flow is therefore never interrupted, because the excess water drains into the pool through the riser pipe inside the bell. In this way, the box is prevented from overflowing; Of course, the criterion remains the constant and therefore economically unacceptable high water consumption.
By correcting the float on the pole or. by straightening this defect is quickly remedied.
Leak in the inlet regulation
Another reason for the constant running of water into the pool is due to the complete hardening of the rubber stopper or the rubber plug. due to water stone deposits, which prevent the valve from closing properly.
The inlet valve has recently been produced in two parts, namely, the valve housing is firmly connected to the nozzle part in a plug-in connection. The ones in the picture 5 Incidentally, the dismantling of the valve shown is also required in this case, if the filling process of the box takes too long, because dirt particles in the pipe blocked the nozzle. With a knitting needle is about 2,5 mm large nozzle to pierce.
The valve seal consists of a plug of 9 mm diameter and 6 mm Length, which rarely needs to be replaced (picture 6).
Replacing the wearing parts on the upper valve part
■ Rubber ring, 10mm outside diameter, 2 mm thickness; O-ring made of rubber, 16mm outside diameter, 3 mm thickness
■ Screwdriver, water pump pliers (pipe wrench)
This maintenance work is very rare, because the fitting upstream of the cistern is normally never used, but always stands for continuity. The non-functioning is actually only then determined, if the valve has to be closed once during repair work on the cistern. picture 7 shows technical details; the upper part of the fitting can be removed after removing the hand star and unscrewing the knurled union nut.
Glutos
Particular care should be taken when tightening or. Conversion of the chain hoist device required. The tightening of the 10 mm machine screws on the chain hoist must be done with a sure instinct, so that the thread of the plastic holder does not break out (picture 8). If the inlet valve whistles during the filling process, then scale has usually settled on the nozzle, which you can either do with a pointed object or with older models (picture 9) removed by repeatedly closing and opening the hand wheel. If that doesn't help, the valve is removed and placed in vinegar water for several hours.
Universal cistern, model 920
This cistern from Voigt KG consists of a frost-proof plastic housing with a scratch-resistant cover, Eisenberg, which is primarily intended for social facilities and for equipping kitchen-bathroom cells in standard housing construction, can be both high hanging (installation height 1750 to 2250 mm), hanging halfway up (installation height 1325 mm) as well as low hanging (installation height 850 mm) to be assembled (picture 10).
First of all, the foam float is new, and the drain set was constructed completely differently, previously referred to as a bell. The fixed part of this set is plugged into the V-shaped counterpart located on the rear inside of the box in a kind of link guide. The, what moves and what happens with the operating lever or. triggered with the chain hoist, is the overflow pipe with the seal for the bottom valve. The swimmer's body stops – also made of foam – the overflow pipe together with the seal in the open position, until the predetermined amount of water (she lets herself up 6 or 10 Set liters) has flowed out. Only then does the water in the fixed part of the drain fitting slowly flow out through the existing holes, whereupon the float sinks and the seal sits securely on the bottom valve (Principle of the "water brake"). When the cistern is full, the float body in the "brake reservoir" is not able to, lift the bottom valve seal on its own, because the water pressure on it prevents this.
The filling of the box takes place in the previously known manner: As soon as the incoming water in the box has reached the intended water level (= horizontal edge of the float) has reached, swivels upwards with a quick tilting movement, thus causing the valve to close immediately and without recoil. This reduces the noise level to a minimum.
1 a) filled cistern, b) actuation of the chain hoist, c) rinsing process; filling the box
2 A view of a porcelain cistern with a valve, Bell jar, Schwimmer
3 special rubber seal
4 Rising pipe with the porcelain bell removed – 1 special rubber seal, 2 bottom valve
5 Pipe connection in squeeze sleeve design
6 Parts of the filling valve – The valve seal (rubber stopper) can be turned around.
7 Wear parts on the upper part of the shut-off valve: 1 O-ring made of rubber, 10mm outside diameter, 2mm thickness; 2 O-ring made of rubber, 16mm outside diameter, 3 mm thickness
8 Be careful when attaching the towing device!
9 Older cistern valve with upper part unscrewed. To get the float rod retainer and seal body out, the grub screw is removed.
10 Plastic cistern, low hanging
11 Flushing cistern in full condition
12 cistern after emptying
