I have a Roltechnik Hawaii-P 900 curved shower tray, which has a 50 mm diameter drain hole (contrary to the Φ60 indicated in its diagram). I would like to understand the components involved in the drainage system, particularly regarding the potential for leaks.
The assembly includes a strainer and bridge, along with a black gasket approximately 0.5 cm high. This setup resembles the "OBI univerzális szelep acél 38,5 mm" which I previously inquired about here (I've included its images in there). However, I've noticed that the OBI strainer has 7 holes, while my current strainer has only 6, so it's unclear to me if that strainer can be replacing mine, for example.
My main concern is whether the inner pipe that extends downward from the bridge and connects to an unseen hub or seal below is or isn't gonna leak water. Since this pipe (which is smaller than the bridge's hole) rotates with the bridge(as if it's glued or fused to it), could this indicate a potential leak at the connection point between the bottom of this pipe and whatever it connects to (hub?)? Unfortunately, I cannot access or inspect underneath the shower tray.
I have two possible configurations in mind for the assembly (though I lack experience in this area):
- Configuration A: Alca A461-50
If it is like this, it's definitely unscrewed or loosened, as I can rotate the bridge indefinitely in any direction with something like pliers (it doesn't move too easily though, but with pliers it seems to be easy) - Configuration B: Alca A81-DN40
If it is like this section, then is it leak-proof ? though when I do rotate the bridge(with the pipe) it does feel like there's lime scale or mineral scale (what's it called, calcium carbonate?) in the resistance, so if there's a gasket like here, it might mean it has lime scale between it and the rotating pipe, right?! which might mean the seal could be leaking, most likely?
Additionally, here’s a picture of my strainer:
And here’s a view of the shower tray's drain hole, showing the visible bridge and inner pipe. The reflection at the bottom is just water reflecting the white above. The entire pipe rotates with the bridge, but the top black gasket does not rotate due to lack of pressure from above or below.
If I decide to purchase a new strainer and bridge, what should I look for to ensure compatibility, considering the differences in hole count and size?
Any insights or experiences with this type of drainage setup would be greatly appreciated!
