Corroded welds · metal hatch
Drinking water
Reservoirs and water towers
A closed structure, permanently damp, rarely visited: the hatch must not rust.
Range · GRP composite access hatches
The GRP composite hatch that doesn’t rust, and that you lift with one hand.
The idréva GRP composite hatch, made of glass-reinforced plastic, is a one-piece access hatch, in a standard size or made to measure. The fall protection bars are built in; the design office approves the configuration and supplies the installation drawings. All you have to do is install it.
20 yearsservice life
11 kgminimum weight
40+ kgfor a stainless steel hatch
One-piece GRP composite hatch · RTM
Pro accessPro portal · workwith.Your price · € ••• excl. VAT
- 01Your discounted priceBased on your company’s terms.
- 02Configure and priceOnline; quote checked by your account manager within 48 working hours.
- 03Drawings and data sheetsInstallation drawings and data sheets, in your portal.
Sign in to my pro portalNo access yet? Request it
02 — Applications
A composite hatch for reservoirs, pumping stations and basins.
Drinking water, wastewater, openings above a drop: wherever a metal hatch causes problems.
Heavy metal hatch · lifting equipment
Wastewater
Pumping stations and basins
H₂S, chlorine, ozone, acidic effluents: isophthalic polyester is unaffected, and the hatch can be handled with one hand.
Structure · fall protection
Safety
Structures with a fall risk
As soon as the opening is above a drop, the built-in bars protect the person opening it, with no extra equipment.
Fall protection grids03 — Why composite
GRP or metal hatch: what people hold against metal.
Metal“Corrosion always comes back.”
Inert one-piece moulding, with no welds and no galvanic couple. Isophthalic polyester, unaffected by effluents and H₂S.
0welds
Metal“Heavy, or too flexible.”
11 to 26 kg depending on size, against 40 kg or more for stainless steel: it’s light enough to open with one hand.
11–26 kgstainless steel: 40+ kg
Metal“Fall protection compliance?”
Composite bars built into the frame. 1,200 J impact test following the INRS ED 6076 method: 3 consecutive impacts, the bag does not pass through. Validated by a third-party inspection body.
1,200 JINRS ED 6076 method
Anatomy · a single RTM moulding
01
One-piece frameMoulded in one piece by RTM (resin transfer moulding), with no welds or metal joints.
02
Anti-slip coverChequer-plate or silica grit finish. 1, 2 or 3 leaves.
03
1,200 J barsFall protection built into the frame.
04
A4 stainless steel fittingsOptional 2-point locking and lift-assist strut.
One-piece frame
Chequer-plate cover
1,200 J bars
Designed, calculated and made by us.Made in Normandy · in-house design office · standard or made to measure
04 — The range
GRP hatches: three installation types.
One sub-family per installation type. The number of products comes from the catalogue.
T1 hatch
OneBloc™Frame set on the slab, projecting 110 mm.
7 products
T2 hatch
OneBloc™Recessed into the slab opening.
Coming soon to the catalogue
Double nested · drinking water
Double nested cover, 2-point locking, for drinking water reservoirs.
5 products05 — Standards and documents
GRP composite hatch: dimensions and the 1,200 J impact test.
Specifications
Permissible load250 kg/m²
T1 frame projection110 mm
Max. dimensions1,500 × 800 mm
Larger sizesMade to measure
Weight, 600 × 60011 kg
Weight range11 to 26 kg
MaterialIsophthalic GRP
ProcessOne-piece RTM
FixingsA4 stainless steel
Carbon footprint3 kg CO₂e per kg, over the whole life cycle (carbon assessment by an external consultancy, Bpifrance scheme)
Fall protection1,200 J impact test passed
Three consecutive impacts: the bag does not pass through. Validated by a third-party inspection body.
INRS ED 6076 method
Documents
Selling points · T1 hatchesPDF · account holders onlyPro accessSelling points · T2 hatchesPDF · account holders onlyPro accessSelling points · Drinking waterPDF · account holders onlyPro accessData sheets and installation drawingsPDF · account holders onlyPro access
idréva documents are reserved for professional accounts. Request access Sign in
06 — Ordering on workwith.
Three steps, one person who answers.
01Configure and price
Dimensions, installation type, options. You build the estimate in your portal, with your terms applied.
In the pro portal02Account manager check
They check the configuration, adapt it to the structure and send you the updated quote.
Quote within 48 working hours03Followed through to installation
Production in Normandy, installation drawings supplied, order tracked from your portal.
Made in NormandyYour hatches, priced in your portal.
Access is approved within 24 working hours. No prices are shown to visitors: your estimate is built with your terms applied.
07 — Common questions
GRP composite hatch: your questions before you choose.
Seven short answers. For anything else, your account manager replies in the pro portal.
A GRP (glass-reinforced polyester) hatch is a composite access hatch. At idréva, the frame is one-piece, moulded by RTM (resin transfer moulding) in isophthalic polyester, with an anti-slip cover, built-in fall protection bars and A4 stainless steel fittings. It doesn’t rust and weighs 11 to 26 kg depending on size.
Yes. The idréva GRP composite hatch is fitted on reservoirs and water towers: isophthalic polyester, one-piece, corrosion-free. The Drinking water range includes a double nested hatch with 2-point locking. The data sheets are in the pro portal.
The T1 is raised: its frame stands 110 mm above the slab. The T2 is recessed into the slab opening. Your account manager helps you choose, depending on the structure.
Up to 1,500 × 800 mm as standard; beyond that, the hatch is made to measure. Permissible load: 250 kg/m². The fall protection bars passed the 1,200 J impact test (3 consecutive impacts, INRS ED 6076 method), validated by a third-party inspection body.
No. Prices, the configurator, data sheets and installation drawings are reserved for the workwith. pro portal, open to operators, distributors and installers. Access is free, with no obligation, and approved within 24 working hours.
You configure and price in your portal; your account manager checks the configuration and sends you the quote within 48 working hours. The hatches are made in Normandy; the production lead time is given with the quote.
No: the hatch weighs 11 to 26 kg depending on size and can be handled with one hand. One-piece RTM, no welds or joints, A4 stainless steel fixings. Installation drawings are supplied.