Use And Care Manual

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Fitting with self-adjusting diameter for PEX and PEX-AL-PEX pipes series 680
Function
The self-adjusting fitting for PEX and PEX-AL-PEX pipes is a mechanical device that allows the pipes, the radiant panel
system circuits and the manifolds to be connected easily and securely. This versatile fitting has been specifically designed
to adapt to the varying pipe diameter tolerances.
Patented
Technical specification
Materials:- nut: brass
- adapter: brass
- seals: EPDM
- insulation ring: EPDM
- olive: PA
Medium: water, glycol solutions
Max. percentage of glycol: 50%
Max. working pressure: 150 psi (10 bar)
Temperature range when using ASTM F876 PEX tubing:
41°F (5°C) to 180°F (82°C)
Temperature range when using ASTM F1281 PEX-AL-PEX tubing:
41°F (5°C) to 167°F (75°C) with tubing rated 200°F (93°C)
41°F (5°C) to 122°F (50°C) with tubing rated <200°F (93°C)
Characteristic components
1) Adapter
2) Olive
3) Nut
Product range
Series 6805 . . Self-adjusting fitting for PEX and PEX-AL-PEX pipes Size 3/4”
Construction details
Versatility of pipe-fitting
This fitting has been specifically designed to adapt to several pipe diameters. The large variety of PEX and
PEX-AL-PEX pipes available on the market and the wide range of permissible tolerances have made it
necessary to find an innovative solution for mechanical fittings. While maintaining the nominal dimensions
of the fittings currently available on the market, this new solution has been constructed so that the same
fitting can be used for pipes with differences on external diameters of up to 2 mm and differences on internal
diameters of up to 0.5 mm.
Resistance to pull out
This adapter offers a high degree of resistance to pull out of pipe. Its special clamping system makes it
suitable for every application and ensures a leak tight fit.
Low pressure losses
The internal profile of the adapter (1) has been shaped to obtain a Venturi effect when the fluid passes
through, reducing pressure losses by 20% compared to those created by passages with a similar diameter.
Insulation ring
The fitting is equipped with a rubber insulation element (2) to prevent contact between the aluminium in PEX-AL-PEX pipe and the brass fitting,
thus preventing galvanic corrosion generated by the two different metals.
Dual O-ring seal
The adapter is equipped with two O-ring seals (3) and (4) in EPDM to prevent leaks even when operating at high pressure.
Series 680
Self-adjusting fitting for PEX and pex-al-pex pipes with internal Venturi effect profile to limit pressure losses. 3/4” F connection.
Brass nut and adapter, EPDM seals, EPDM insulation ring, PA olive coupling. Medium: water and glycol solutions. Maximum
percentage of glycol: 50%. Maximum working pressure: 150 psi (10 bar). Temperature range: 41 to 180°F (5 to 82°C)
(PEX);
41 to 167°F (5 to 75°C) with tubing rated 200°F (93°C); 41 to 122°F (50°C) with tubing rate <200°F (93°C)
(PEX-AL-PEX).
SPECIFICATION SUMMARIES
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680507
680503A
680504A
680555A
680505A
3/4”
3/4”
3/4”
3/4”
3/4”
5/16”
3/8”
1/2”
5/8”
3/4”
Code
Thread
size
PEX
size
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