Order an Inspection Chamber Riser 320/470mm for Drainage and Sewer Systems.
Please note risers do not come with seal included. These are available to buy from the category page.
Inspection chambers – otherwise known as manhole covers – are an important part of any drainage system. However, your inspection chamber won’t always sit at the level required – so we provide inspection chamber risers in either 320mm or 470mm to make sure your manhole cover surfaces exactly where it’s needed.
Kitemarked and UK-made – for your peace of mind
As trade professionals, we appreciate quite how important it is to be able to fit parts and walk away from the job knowing they’ll stand up to whatever comes their way. This is why we make sure all our drainage and sewer systems are made in the UK to the very highest standards – so you can be confident you’re getting outstanding quality at a great price.
Every inspection chamber riser we provide meets British manufacturing standards and is kite marked for your peace of mind.
Quickly and easily cut to size
Should you need to cut the inspection chamber riser to the size that works for your job – you can – and you’ll be able to quickly adjust it using a fine-tooth saw.
Please note: if you create an inspection chamber which exceeds 1,200mm – you’ll need to fit a chamber reducing ring to ensure compliance with building regulations.

Bulk discounts – even for single items
Ever seen a bulk price on a merchant’s website but discovered you need to order 20+ to get it? At EasyMerchant, we do things differently. We negotiate outstanding prices with the UK’s best sewer pipe parts manufacturers – then, we pass those discounts on to every one of our customers.
It doesn’t matter if you’re ordering one inspection chamber riser – or dozens to keep in stock; you’ll get top quality products at rock bottom prices.
Next day dispatch
We aim to dispatch all orders for next day delivery, however please allow 2-3 days as a precaution.
TGR Building –
Manhole bases turned up on time as described. Even BBA approved. Good value
Anonymous (verified owner) –
Darren Steel (verified owner) –
Cameron (verified owner) –