Gearboxes have after strainer. Typically, the initial pressure ranging from 0.5 to 6-7 atm. Optimal for sanitary measures (3-4 atm) are placed with the built-in pressure gauge. Adjustment is carried out through the hand wheel or screw, available in the gear housing. Some motors are installed in one housing with a filter.
When the pressure in the network is small (below 0.85 atm), we can recommend the installation of the input step-up pump in the apartment, such as UPA 15-90 of GRUNDFOS (Germany) or similar firms to DAB (Italy) or VORTEX and WILO (Germany). But note that setting the pump requires the mandatory approval by the relevant bodies. Correct operation of sewer lines do not require any additional equipment. However, we must remember that the pipe, the outlet drains must be laid with a gradient (1.5-4%) in the direction of the riser. For a sufficiently long tube that can be difficult, because it quietly and not spend a headband you can not hide. It is very difficult create an indentation on the sewer riser (his local break.) This measure is sometimes necessary to 'fit' any instrument in the plumbing box. It is unacceptable that any plots were obtained by horizontal indentation. At the same time a great danger of clogging the riser in your apartment and the collapse of the hydraulic gate devices have lower neighbors.
As a result, litigation costs and triple you provided. The company's specialists 'GALASTAYL' suggestions to create slope on the riser sections of the indentation at least 22,5 . Finally, we note that for mounting plumbing fixtures have been increasingly used special frame design with the necessary fittings (followed by foreign sellers domestic experts were called to install them). These devices accelerate the installation, guarantee quality of systems, but most importantly – make it possible to place devices not only on the walls or in the immediate vicinity, but also in any other place.