If it is necessary to provide hidden access to hidden niches in the wall with combs of warm floors, to access the boiler hidden behind the false wall of the toilet, and also if it is necessary to hide wide openings under the bathtub with relatively frequent use, we recommend paying attention to the use of double-leaf horizontal or double-leaf vertical concealed mounting hatches on a swing or sliding adjustable hinge.

Naturally, when choosing such a design, it is necessary to take into account the presence of a vertical seam between the sashes.