Volume control from Brett Martin

It is a given that all surface water from buildings must be removed safely without damage to the building, but with climate change resulting in more frequent high intensity rainfall and increased volumes of water, this has presented challenges for specifiers when it comes to the design of rainwater systems. To ensure buildings are able to remove rainwater effectively, high capacity drainage systems are now playing an ever increasing role in protecting buildings and their contents from heavy or constant rainfall.

Damaged and badly performing rainwater systems are one of the most common reasons for contractors being called back to a job, according to the BRE (BRE Repairing and Replacing Rainwater Goods 1997). And with water ingress and penetration the principal reason why buildings fail, it is absolutely critical that rainwater systems are designed to remove rainwater quickly and efficiently.

In order to provide the most reliable, effective and efficient drainage and to meet the requirements of larger commercial projects, factories, warehouses, agricultural and residential roofs, Brett Martin Plumbing and Drainage has specifically developed the new Deepstyle 170 high performance rainwater system.


“With a super-sized 170mm profile, the new Deepstyle 170 rainwater system is the ideal rainwater drainage solution for larger roof areas and has a capacity of 11.54 litres per second1” commented Glenn Goodman of Brett Martin. “It also requires fewer discharge points, reducing the number of downpipes to provide both material and installation savings.”

The drainage capacity alone provides opportunities for contractors to make savings on both downpipe system installation and underground drainage layouts. Manufactured from modern plastic materials at Brett Martin’s own quality assured BS EN ISO 9001:2008 factory in Mallusk, County Antrim, the Deepstyle 170 system is a robust, hard-wearing solution. Tested to EN 1462 Load Class H to withstand heavy duty snow loading, the high gloss PVC system is also proven to retain its stunning aesthetic with UV protection providing long term colour stability – backed by a 10 year colour warranty.


A unique addition to Deepstyle 170 and one that offers exceptional long-term sealing reliability, the innovative CLIP & SEAL system fully integrates with the fitting so that the specially designed captive seal is held securely within the fitting whilst the clip locks the seal firmly in place. When fitting the gutter, the CLIP provides just enough flex to allow the gutter to locate within the fitting, whilst a reassuring click locks the gutter securely into position compressing the seal for superior sealing.

Available in black and grey, Deepstyle 170 integrates seamlessly with Brett Martin’s 110mm Industrial Downpipe System to complete the company’s high capacity offering. Comprising 110mm plain ended or single socket downpipe options, with high quality PVCu fittings, including bends, branches, access pipes and clips, the system retains the adaptability essential in planning an industrial rainwater scheme.

As the latest addition to Brett Martin’s rainwater portfolio, Deepstyle 170 complements the existing range which includes 106mm Prostyle, 112mm Roundstyle, 114mm Squarestyle, 115mm Deepstyle and 160mm High Capacity in addition to the innovative and highly acclaimed Cascade range of cast iron effect guttering and downpipe profiles.

With a reputation for quality and reliability, Brett Martin’s comprehensive plumbing and drainage range is underpinned by on ground support from the sales team as well as a dedicated technical department who are on hand to help with technical queries.

The changing climate and increased rainfall is putting more pressure on UK building stock, which is why removing rainwater from a roof in the most efficient way possible is critical. High capacity drainage systems provide maximum protection and should be equally as important as the roof construction itself.


1 Actual test results calculated in site conditions given a fall of 1:350 and maximum roof area 550m².