If our FAQs didn’t cover your question, contact our team for expert guidance.
For lead times please refer to our lead times sheet here
To get a breakdown please see our carriage charges here
For assistance in where and how to place an order for AWMS products please contact your local area sales manager through our technical sales contact page here
In order to obtain a quotation please send any drawings or bill of quantities to the below: estimating@alumascwms.co.uk
Cast iron is the preferred drainage material of many specifiers. Its inherent strength, durability, ease of fitting, fire resistance, low coefficient of thermal expansion and its low noise transmission properties cannot be matched by modern plastics.
A chop/mitre saw, with a thin blade and plenty of teeth to get a fine cut. After the cut you will want to deburr the edges and apply touch up paint to protect the aluminium.
Only when in contact with naturally aggressive metals and other substances. However, preventative measures are normally available (please seek expert advice from Alumasc Technical Services).
Aluminium is a non-corrosive metal. Although a natural oxidation effect occurs on unprotected aluminium, the process actually protects the metal from further corrosion. Some specifiers request plain aluminium to make a feature of the oxidised aluminium.
BSEN12056 calls for a 50% reduction in design capacity if balloon leafguards are fitted.
Only periodic maintenance is required in accordance with good maintenance procedures. Polyester-coated aluminium requires only a warm soapy water solution to bring back the original appearance. Twice a year (once in the Autumn and again in the Spring) we recommend that gutters and joint integrity are checked, removing any collected gutter debris.
4” NPSM threaded
This depends on the flow rate required but is usually between 1:40 – 1:100
When the outlet is installed vertically gravity assist in draining the outlet, whereas when installed horizontally this reduces the flow rate as gravity is not assisting as much and friction also occurs which slows the rate down.
This is the industry British standard and is the same for all rainwater outlets manufactured. Also, this is so the outlets can be directly compared to one and other.
Harmer shower drains should never be used with a softened water supply; the salts in the water are aggressive to surface finishes causing harmless discolouration to nickel bronze grating components but progressive surface oxidation of unprotected aluminium surfaces.
Roof outlets fitted with raised or domical gratings are less prone to blockage than outlets fitted with flat gratings.
A patented baffle arrangement and funnel shaped outlet allows the outlet to function to the maximum level allowed by BS EN 12056 (33% full pipe). Thus fewer downpipes and/or higher factor of safety is offered to the building.
No – Harmer roof outlets are designed specifically for gravity fed drainage systems.
Cut the spigot off the gutter length and install the internal stop end on contemporary ranges or an external union will need to be ordered to connect the internal stop end on heritage systems
Yes, the 1.83m length includes the cast socket.
We manufacture and install internal gutters which are concealed within a fascia and soffit system, however we do not manufacture or supply parapet or valley gutters.
Alumasc does not recommend the fitting of any leafguard products, as they can have a detrimental effect on performance, especially when blocked with leaves.
Product range datasheets are available to download from the product range pages on this website. Individual product SKU datasheets are available to print from the product pages and BIM files are available to download from product SKU pages also. All of these items are also available to download from our download centre which you can access here
Although Alumasc WMS carry an extensive product range, we are always willing to offer our engineering expertise in manufacturing to your requirements.
For any returns related queries please contact your local area sales manager through our technical sales contact page here
