Fittings — Reducers and adaptors
Reducers and adaptors
Product families of reducers and adaptors in grades SS304 and SS316L.
Reducing adaptor to PRESS
316L · 15 variants
Reducer
316L · 10 variants
Illustrative photo — The photo shows the AISI 316L version. The supplied version is made of AISI 304 (1.4301) stainless steel and differs in material and marking.Reducing adaptor to PRESS
304 · 15 variants
Illustrative photo — The photo shows the AISI 316L version. The supplied version is made of AISI 304 (1.4301) stainless steel and differs in material and marking.Reducer
304 · 10 variants
Frequently asked questions — Reducers and adaptors
What materials are TAVINOX GROOVE reducers and adaptors made of?
Each family is made in one stainless steel grade: AISI 304 (1.4301) — PR64GRF and PR64GRGR; AISI 316L (1.4404) — PR14GRF and PR14GRGR.
What sizes are TAVINOX GROOVE reducers and adaptors made in?
50 variants in 4 families for DN125, DN150, DN200, DN250 and DN300 (outside diameter 133, 159, 219, 273 and 323.9 mm).
What is the nominal pressure of TAVINOX GROOVE reducers and adaptors?
Nominal pressure 1.6 MPa (PN 16); gasket: EPDM elastomer; groove system: TGS — rolled groove.
Up to what temperature can TAVINOX GROOVE reducers and adaptors be used?
In drinking water pipework up to 80 °C. For other media (e.g. heating) the operating temperature can be up to 110 °C.
What certification do TAVINOX GROOVE reducers and adaptors have?
The TAVINOX GROOVE grooved system holds ITC product certificate No. 26 0151 V/AO for drinking water and heating installations, issued on 12 May 2026 by Institut pro testování a certifikaci, a.s. (authorised body No. 224, Czech Republic). The technical data list the certifications CCZ, ITC and ISO 9001. The TAVINOX GROOVE system was tested at ITC to DVGW standards; it does not hold a DVGW certificate of its own.
Can TAVINOX GROOVE reducers and adaptors be connected to the TAVINOX PRESS press system?
Yes, with the grooved × press transition fittings: PR14GRF and TK14GRFGR — AISI 316L (1.4404); PR64GRF and TK64GRFGR — AISI 304 (1.4301). Their press end takes TAVINOX PRESS tubes of 76.1, 88.9 and 108 mm.
Buy online from our partners
TAVINOX is sold exclusively through wholesale and retail partners. Here are their online shops — you order directly from them. (TAVINOX GROOVE grooved system)
From each of these partners you buy the original TAVINOX system with all certifications and the manufacturer's warranty. All sales points and map →
Have a technical question?
A TAVINOX technician will personally answer your questions about the TAVINOX GROOVE grooved system.