Specifiers working on hotel and leisure projects often face recurring problems when designing shower and wetroom drainage. These problems stem from a combination of heavy daily use, tight maintenance windows, mixed floor constructions and constrained vertical space. Common consequences of poor design are unpleasant odours, slow drainage, damage to finishes from standing water, inaccessible fixtures, and costly remedial work needed to fix channels, traps or gullies that fail to perform under peak demand.
A second challenge is hydraulic reliability. Many wetrooms experience pressure fluctuations when several outlets operate simultaneously, while undersized channels or poorly optimised trap layouts increase the likelihood of siphonage, seal loss and backflow. Limited floor build-up and awkward pipe routes in refurbishment projects restrict where standard traps or gradients can be used, forcing compromises between performance and what’s practical.
AVOIDING COMMON PITFALLS
To reduce whole-life operational risk, specification decisions must address three overlapping concerns: long-term serviceability, hydraulic capacity and the adaptability of the installation. Where serviceability is concerned, gullies and traps should be accessible for routine cleaning without the need for specialist tools, and the shape and layouts of components used should minimise debris accumulation. Specifiers should therefore include removable trap assemblies and grates that can be lifted for inspection and cleaning. Surfaces that are simple to disinfect in high-use environments are also a positive for any installation where a good standard of hygiene is expected.
For hydraulic capacity, specifying channel and gully systems with proven discharge performance and trap designs will help resist siphonage. Optimised trap positioning and suffi cient channel capacity reduce standing water as well as the risk of seal loss during peak flow conditions. Continuous channel runs also help manage larger discharge volumes in communal facilities.
Installation adaptability should also be considered, especially where floor build-up is limited or pipework access is constrained. Low-profile solutions and adaptable outlet orientations prevent compromises to trap depth or falls. Rotating or horizontal gully assemblies, modular channel elements and height-adjustable frames allow installers to align drainage to the substrate and membrane without bespoke onsite fabrication.
SIMPLIFYING SPECIFICATION
Being able to specify the solutions that provide high-quality and hygienic drainage, while also allowing for simple cleaning and maintenance for the life of the installation, requires specifiers to be familiar with the latest developments in drainage solutions.
ACO Building Drainage has developed new solutions for hotel and leisure projects as part of its latest ShowerDrain range. These were designed specifically to tackle the challenges that specifiers face, including serviceability, hydraulic capacity and adaptability. Key elements of ACO’s new range include the Modular 125 system for continuous runs in communal showers or poolside changing areas. Specifiers can meet complex or irregular layouts by using ACO’s custom corner and gully arrangements.
Low-build height solutions in the new range are ideal for constrained floor heights, and the hydro-formed gullies of ShowerDrain C enable higher flows and easier cleaning. Also available is ShowerDrain E, which is compatible with tiled or flexible floors and features a horizontal gully body capable of 360° rotation for tight or irregular spaces. ShowerDrain B offers a cost-effective project solution for tiled floor installations.
The problems that specifiers deal with take careful consideration, testing and expert design to overcome. They need to be able to select the right parts for the job and deliver the highest quality results, striking a balance between drainage performance, hygiene, and aesthetics.
www.aco.co.uk