How often does your power go out? Adults and teens in the house should be cognizant that when the power does go out, the half hour shower will have to be postponed but it's not like it has to be an overriding fear that prevents the bathroom from being used. Commercial and institutional buildings with basement restrooms often have the same setup, albeit larger systems. My laundry tub, washer and basement bath all go into the same ejector pump pit. My power typically will only go out due to a severe thunderstorm and be out for 4 to 6 hours tops. It's pretty obvious that the power is out and the basement bath, washer and laundry tub are just not used at those times. The toilet is older and has a 3.5 gallon flush. If the pump has just cycled, It takes 2 flushes for it to kick in again. My guess is it would take at least 5 or 6 flushes to start coming out of the shower drain. Maybe more - I've never tested it. The pit doesn't fill to the top before the pump kicks in; there is some buffer there as well.

Actually, we would generally run the waterproofing throughout bath floor and up 3-6" on bath walls, but every situation is different. Local codes also come into play. 36" is generally considered the minimum length for curbless. Ability to achieve proper slope is critical. Choice of tile can come into play for ease of slope. The attached article is a good overview. The TCNA 2018-19 Handbook is also a good reference. Hopefully your tile contractor is familiar. Specifically they should reference guideline B421C-18. Regarding waterproofing, the guidelines indicate "..also the floor and wall waterproofing must continue outside the immediate shower area one foot beyond the high point of the floor, but not beyond the tiled area. Additional waterproofing of floor and/or walls outside the shower area may be needed to effectively contain and evacuate shower water and splash ...When additional waterproofing of floor and/or walls outside the shower area is desired or required, the building design professional must specify all areas to be waterproofed and indicated membrane termination points". It also references the use of a secondary drain outside the shower area "when required or desired". Something to consider. https://ctasc.com/wp-content/uploads/2016/04/CurblessShowerArticleTileLetterMarch2016.pdf Here is another reference which was just published in our March industry publication: http://tileletter.com/2019/03/critical-planning-for-curbless-shower-success/

Hi We have a walk-in shower with sliding door and a fixed panel and the threshold is unique which was installed by new build buider some 6 years ago. The shower frame, sliding door and fixed glass panel do not have any manufacturer / brand name so looking for some advise who might know the manufacturer or this particular threshold part supplier. We have similar threshold in other shower rooms, so I know this threshold piece comes in length and can be cut to size. See photos below of threshold. RIGHT SIDE LEFT SIDE FULL LENTH, Threshold lifted up as silicon is now loose. you can see that it has a built-in plastic seal which is coming off from the threshold. You can also see both ends of thresholds in this photo which is unique. google search could not find any threshold with this type.

no fixed glass will replace bath and shower curtain with a shower tray and a glass panel as i dont want a shower enclosure x