FAQ on joining without welding

On steel, boiler, copper and stainless pipe within the manufacturer values: Gebo says permanent, GF calls its PRIMOFIT clamps temporary. On PE, PVC and multilayer pipe always short-term only and cold water only. Repair clamps, rule of thumb FR-18.

Yes – malleable-iron and brass compression fittings are released for permanent use, resistant to tension and shear. Multigebo likewise (temperature-cycling test).

Only with the civil-engineering clamp gebounifix maxi (one- to three-part) in cold water; length = damage plus pipe diameter, for PE plus 50 percent. Inside a building a break means a pipe replacement: section out, new section in, two couplings type O.

A rubber cone for a hole on a depressurised line – gain minutes, then repair properly.

Malleable-iron compression fittings: GF expressly calls PRIMOFIT a detachable clamped joint; with Gebo, seal ring and grip ring are available as spare parts and are renewed on reinstallation. Multigebo and polygebo are intended by Gebo for single installation only. GF names screws, nuts and seals of its repair clamps as replaceable.

Gebo: malleable-iron repair clamp in cold water yes, with pressure test. Hot water, heating, gas: keep accessible.

Yes – with corrosion protection of the joint and expansion allowance per the pipe manufacturer’s laying guidelines; Multigebo is maintenance-free. Multigebo.

Standard tools for compression fittings (torque guide values in the Gebo installation instructions), ring or open-end spanner for gebounifix middle and maxi, hex key for Minigebo (size 3 or 4) and the Gebo and GF repair clamps, hole saw for drilling through the tapping clamp. No press tool, no welding set.

gebounifix mini manages with 7 mm, Multigebo needs a gap of about 90 to 105 mm between the pipe ends depending on size (without pushing), a coupling type O twice the insertion depth (at 1 inch 35 to 50 mm per side according to the dimension table).

Malleable-iron compression fittings up to 3° per side, i.e. 6° per coupling (Gebo and GF). A repair band needs a straight, round pipe.

On PE, PP and PVC-C pipe always (Gebo supplies it separately, GF PRIMOFIT brings it along, polygebo in the kit); on multilayer pipe the support sleeve from the Multigebo kit; on steel and copper no. Plastic pipe.

Compression fittings and clamps clamp on the outside diameter. 1 inch is 33.7 mm on threaded pipe, 31.8 mm on boiler tube, 32 mm on PE pipe – the nominal size is not enough. Rule of thumb FR-17.

Measure twice 90° apart. If the larger dimension deviates more than the tolerance band of the fitting allows (GF names it per dimension, e.g. 33.3 to 34.2 mm at 1 inch), a repair band with a range helps – or the inquiry with both dimensions.

No. Threaded pipe 1 inch = 33.7 mm, boiler tube 1 inch = 31.8 mm; the boiler-tube series (02.150.…) have their own grip rings.

Measure the outside diameter, determine the inside diameter with the gauge from the Multigebo kit, choose the matching support sleeve. The pipe manufacturer does not matter.

EPDM – at Gebo the series 151/222 (malleable iron, cold up to 25 °C), 313/314 (brass, warm up to 85 °C) and Multigebo (70 °C); retrofit seals for 150/220 we stock. At GF PRIMOFIT the blue EPDM version (warm up to 95 °C).

Outside buildings with the series approved for it: on steel pipe Gebo 150/220 and GF PRIMOFIT NBR (DIN 3387-1, 5 bar), on PE Gebo 153/155 with support sleeve (DVGW G 5600-1, 4 bar). Inside buildings only HTB (Gebo 180 up to 2 inch 5 bar, 225 from 2 1/2 inch 1 bar; GF FIREJOINT up to 2 inch) – and the work belongs to the licensed installer. Rule of thumb FR-19.

Malleable iron NBR 80 °C/6 bar, repair clamp DS 90 °C/6 bar, Multigebo 70 °C/6 bar, GF PRIMOFIT FKM up to 150 °C/10 bar (also steam, water-glycol).

Malleable iron 150/220 up to 12.5 bar (220: 10 bar), repair clamp DS oil-free 10 bar, GF PRIMOFIT 16 bar; for the repair bands Gebo gives no compressed-air release.

Steam only GF PRIMOFIT FKM up to 150 °C; heating oil EL only filling lines (Gebo 150, DIBt); chemicals outside the catalogue list: ask the manufacturer, do not guess.

Gebo compression fittings A/I/O/T 1/2 to 2 inch, repair clamps DS and MD, EPDM seals, gebounifix mini, Multigebo 16 and 20, Minigebo; GF PRIMOFIT couplings, transitions, tees, repair clamps and pipe-burst band. Stocked sizes are in bold on the pages. The standard names dimensions. What is listed here, we carry – from stock or to order; how fast, we clarify on request.

Yes – seal and grip rings, conversion kits and drinking-water seals for the Gebo series; we procure them with the article number of the fitting.

No. Prices and quantities come with the quotation – send us what you have.