Can PP products be glued?
NO!
Can they be butt-welded with HDPE pipes and fittings?
Valsir advises against this! The welding temperature is slightly
higher and the additive inserted to make the PP flame-retardant
renders the weld brittle.
Is it possible to connect PP pipes and fittings with HDPE pipes
and fittings?
Yes! PP and HDPE pipes and fittings are manufactured in compliance
with current regulations and have dimensions that are mutually
compatible. This is confirmed by the fact that the Valsir HDPE
traps are normally installed in systems made using PP pipes and
vice versa.
If a PP pipe develops a hole how can the pipe be repaired? ?
By using the Valsir double sleeve (art. 526), or the double/triple/quadruple
depth socket. Otherwise, if it is found impossible to disassemble
a section of pipe it is possible to use the Valsir automatic hot
air blower (art. 476) with the Valsir strip (art. 477), after
the area around the pipe has been cleaned and scraped.
Is it possible to install PP pipes outdoors as rainwater down
pipes?
Yes! The pipes must be anchored correctly, remembering the importance
of the "centimetre extraction tolerance" and making
the first 2 metres using impact-resistant material (cast iron,
iron, etc.).
What is the maximum operating pressure for PP products?
The waste pipe should not operate under pressure, however, since
there are pumps on the market to decrease the pressure of waste
systems that can operate at more than 10 ATM, we have tested two
PP diameter 40 pipe sections to a pressure of 13 ATM without losses
or leakages from the ring seals.
What guarantees are given with the seals?
A 10-year warranty is provided like all the material manufactured
by Valsir. It should be considered that PP products have been
installed throughout Europe and also in a large number of other
countries for more than 30 years, without experiencing any particular
problems.
Then, as time passes, the fat deposits and soapy waters form a
further seal around the gaskets.
Why are PP products grey?
To protect them from ultraviolet rays and to comply with the recommendations
provided for in the regulations, so that it is possible to immediately
identify the type of material by the colour.
Can PP pipes be stored outdoors exposed to bad weather conditions?
Yes! In any event, the ring seals should be checked before the
pipes are used. Furthermore, it is advisable to replace the ring
seals if the pipes remain exposed to bad weather conditions for
more than 2 years.
Does the Valsir catalogue dedicated to HDPE include the W.C. bend
for the wall outlet into PP?
The Valsir short type bend (art. 534001), is also suitable as a
W.C. bend for use as a wall outlet.
How can a PVC pipe or a pipe made with other material be connected
to PP pipes?
It is necessary to know the diameters to be connected and to define
whether the diameters are male or female.
By definition: a male diameter is the outside diameter of the
pipe or the spigot of special pieces; the female diameter is the
internal diameter of the socket, irrespective of the type of material
used.