PITCH FIBRE

cOVID READY

We understand the importance of safety for our customers and crew. Following the govenment guidelines and clearing your blocked drain.

BLOCKED DRAIN

We will clear your blocked drain, experienced and knowledgeable crew will clear the drain so that your nightmare is over.

CCTV

Once the block is cleared we will CCTV the drain to look into reasons that have caused a blockage. 

FIX IT

If we find a reason for the drain to be repaired are crew will inform you of there findings and offer a solution.

Pitch Fibre The History

Pitch Fibre is a terrible product that was sold to the industry as the product to simplify drainage. Used in the UK from the mid 1960's and luckily only installed until the early 1970's, this product was used highly in the United States and Canada (apparently the empire state building has miles of it) Canada manufactured Pitch Fibre and introduced it in the UK as a lighter, cheaper and easier option to vitrified clay. 

Manufactured in lengths of 8ft with push fit joints (no sealing rings) it could be installed cheaply with no additional cost for cement haunching of the joints. Bedding the pipe in sand it was thought to be the modern flexible drainage system The drainage system of all systems.

This cheaper easier way of installing a sewer sounds great longer lengths of sewer, push fit connections with no hassles no chances of getting gaps, laying the sections down on only a bed of sand. If the engineer has said that your pipe is laying with a belly or flat that's because the pipe is sitting on that bed of sand like its laying on a bed, the gravity of that sewer is not running the right direction this can happen due to ground movement where the sand settles and so does the flexible agile Pitch Fibre pipe.

In the mid 1960's until the early 1970's Pitch Fibre was installed in all types of properties in the UK households, hospitals, schools and holiday parks. Like many other products that were used in this time Pitch Fibre is harmful, created from wood cellulase and coal tar it is lower strength than fibreglass but it is as harmful when broken up. 

 

Call us today for a free quote and advice.

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THE HISTORY

What is a Pitch Fibre pipe?

Where did it come from?

Why do we have it?

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THE ISSUES

Why is it causing you an issue?

What has happened to it?

What do we see?

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THE REPAIRS

What can we do to repair the pipe?

What are the techniques?

What to do now?

 
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Pitch Fibre The Issues

How To Repair?

There are three ways to repair a Pitch Fibre sewer Re-rounding, Pipe bursting and Excavation.

No-Dig repairs are always the direction people head when they are looking at repairing there Pitch Fibre sewer this is Re-rounding and Pipe bursting, they have there benefits but they have there negatives.

Re-rounding 

Until recent years the only way to repair Pitch Fibre pipe from its very poor quality was to excavate rip it out and install new pipe in its place. Now there is the No-Dig methods re-rounding  is very similar to pipe bursting it works by the use of a device that is sent up the in place pipe to reshape and return the deformed pipe work to its original state. depending on the deformaty of the pipe is the difference in technique used.

Re-rounding can be performed on sewers that have blistered at the top or bottom removing the blisters then a liner is installed to maintain the structural integrity of the pipe.

Pipe bursting

When pipes are to deformed to be re-rounded a method called pipe bursting may be an option. Using either pneumatic or hydraulic units the head unit is used to burst the pipe open with internal pressures. This method displaces and shatters the host pipe and it is followed by a HDPE pipe that can be joined above ground and installed from entrance to exit or snapped and cut into small lengths. 

This is a very powerful technique with the pulling power of excess of 30 tonnes it is used to remove items from the sewer rather then repair them, pipe work that is constructed of concrete, cast iron, plastic and vitrified clay have little resistance. As such this technique is mainly used in the gas and water industry to mole through the ground and place the utilities that only require a direction not a direction and an angle like a sewer requires. It has been known for the pipe bursting to stray and go off course causing more issues. 

Lining and HDPE

When your Pitch Fibre pipe has been re-rounded or pipe burst it need to be able to hold its original form or the best form that the technique has left your pipe in. Lining is a technique that has also been around since the 1970's but was not used in the drainage industry widely since 1994 when the patents expired since then this procedure has transformed the No-Dig techniques with large positives for everyone.

Lining is when a sleeve is installed once re-rounding has taken place with resin on the outsides of the sleeve it is positioned inside the pipe, then with the use of water and pressure it is expanded to the size of the pitch fibre pipe as it sits the resin cures and hardens in place creating a pipe inside a pipe.

As with the HDPE this is sent through the pipe following the bursting this is hardened in place as its pushed through. The difficulty with both techniques is the angles that the pipe will sit at when in place, if your sewer is sitting flat due to the sand bed that it is sat on then the pipe will also sit in this position creating sitting water and a large chance of blockages and build ups.

Excavation

Dig the pipe up! When excavating we will dig down and remove the pitch fibre pipe as it lays we advise to remove a large part of the sewer rather then smaller parts as it is then removed and you have the guarantee that your sewer is in good working order. The issue with excavation is if the pipe is inside a property or under a retaining wall there can be multiple issues that come with excavation. It is also a messier technique, the taking away of muck and mud that is removed and the reinstatement of the ground that has been removed. But your Pitch Fibre nightmare has ended!! with the No-Dig solution it is not guaranteed that the issues will be fix as said before if it is not laying correct but also you are laying a new pipe inside the original although millimetres it can be constricting. The removal of the Pitch Fibre is something that is harmful so you will require professionals, once removed the installation of a new plastic or vitrified clay is laid.

Call us today for a free quote and advice.

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Repeat blockages and odours that re coming into your property are signs that your sewer is not working in the correct way that it should be. Once your sewer is cleared and we have taken a look at what has happened if the engineer has seen the black sign of a Pitch Fibre pipe they will be look for the signs of where has it failed. 

Blistering small or large and de-lamination is the result of prolonged contact with water. A product that is constantly in contact with water and waste fails with the contact of the substance its serving? 

When surveyed you often see sharp edges from bricks and masonry starting to protrude the pipe walls and the push fit collars, Pitch Fibre pipes offers no resistance to tree roots and root ingress.

Call us today for a free quote and advice.