Scanprobe CCTV Inspection SystemsFocusing on the future

Archive for the ‘Drainage Tips’ Category

Drain Testing Methods


Posted on: April 7th, 2014

There are various methods of drain testing available depending on the circumstances and the nature of the particular problem to resolve.

CCTV drain survey is the most commonly used method of drain testing and involves inspecting a drain with a camera and reporting any defects.

Drain Testing

Drain Testing commonly involves a CCTV survey

hydraulic water test is used when testing for water-tightness, this test involves stopping up the down-stream pipe in the manhole and filling the drain with water until it can be visually observed at the top end of the pipe.  If the water level goes down it means the drain is leaking.

Dye testing can be used in conjunction with hydraulic water testing which involves adding a colour dye to the water, if the pipe is leaking into a basement area this type of test can highlight the drainage which is causing the problem.

Air testing is used when testing a pipe for air tightness and this involves stopping up both ends of the pipe and then putting the pipe under air pressure using a testing device.  If the pressure drops then the pipe has failed the test.

Drain testing specialists Scanseal

Drain testing specialists Scanseal

 



Dealing with drain blockages


Posted on: February 13th, 2014

Drain blockages, in particular blocked household drains, are inconvenient and can also be a potential health hazard. Most drain blockages are preventable and some of the common causes are avoidable.

 

Common causes of blocked drains

  • pouring cooking fat, oils and grease down drains – these can solidify into the waste system and are notoriously difficult to remove
  • detergent scaling, particularly in hard water areas
  • flushing paper and cloth products such as disposable nappies, sanitary towels, cotton wool buds and newspapers down toilets – they can form a solid mass and eventually stop the flow of water.
  • pouring cement and plaster down drains – these can set rock-hard in the drain
  • pouring waste oil from motor vehicles into drains – it is illegal to do this
  • collapsed or damaged pipes.

 

Drain blockages often require CCTV drain surveys

Drain blockages often require CCTV drain surveys

How can I get my drains unblocked?

Contact a specialist contractor such as Scanseal and request a drain survey or quote to carry out the work. Alternatively you can hire the necessary drainage equipment and/or drain camera from Scanprobe if you are competent to perform the work yourself.

 

Scanseal are specialists in dealing with drain blockages

Scanseal are specialists in dealing with drain blockages

What if my drains keep blocking?

This may suggest that your pipes are faulty in some way. Tree root penetration and subsidence are common causes of broken pipes and specialist equipment is required to cut the roots and then repair the pipe.

If you are a property owner, you may want to have a drain survey using close circuit television (CCTV) equipment. You may find that the cost of a drain repair to your house is covered by your insurance.

.

Further help and advice

If you want to report a drain problem or require further advice please contact Scanprobe on 0203 253 2001 or email sales@scanprobe.com



Drain Relining And Drain Pipe Re-rounding Service


Posted on: January 14th, 2014

Drain relining is a cost effective alternative to traditional drain repairs and one major benefit is the lack of mess it creates. At Scanprobe, our non-intrusive, no-dig technology will ensure your drains are back to perfect working condition quickly, and that they remain free flowing.

 

The drain relining method

A flexible liner impregnated with resin is pushed through the drain while an air bag is also pushed through to mould the resin to the pipe. The liner is heated, and once cooled will mould exactly to the sides of the original pipe. Once the air bag is removed, it leaves behind a smooth new pipe inside the original that is in fact stronger than the original.

 

Drain pipe re-rounding

This is a method of winching a specialist re-rounding tool through the pipe to reform it to its original shape enabling the pipe to be re-lined. Scanprobe offer a pipe re-rounding service to pitch fibre drains together with hydraulic pipe bursting and directional drilling. A lead bullet is pulled through the collapsed drain which re-opens the pipe allowing the liner to be put in place. When the liner has cured, the result is a drain once again in perfect working order.

 

Localised patch repairs

Typically used in areas where traditional excavation is difficult or with awkward access, localised patch repairs are a fast, cost efficient method of repairing blistered pitch fibre or crushed pipework in diameters of 100m to 450m and to a length of usually 100m. Repair work can include re-forming the pipe if necessary and then installing the patch liner.

 

Water Authority Standards

We will provide an extensive in-depth quotation before undertaking any sewer or drain repair works, which can be shown to insurance companies if required. We use the most modern and current sewer renovation methods to ensure all our work is carried out to Water Authority Standards. One of our engineers will be able to perform a site survey prior to quotation, and will explain the necessary steps required for the repair.

 

Drain relining benefits include:

  • No-dig or excavation of surfaces
  • Minimum disruption and down time
  • Suitable for drain/ pipe diameter ranges 100 to 1200mm
  • Suitable for handling bends and offset joints
    • Increased flow rates
  • Various types of pipe material can be renovated
    • Tree root infestation prevention
  • Lining systems available for runs containing diameter changes
  • Runs of up to 100 metres relined in one continuous length
  • Renovation and reline works are covered by our Company guarantee

 

Scanprobe Drain Repairs

Scanprobe Drain Repairs



Inversion Drain Lining Using No Dig Technology


Posted on: December 30th, 2013

Repairing drain lining using No Dig Technology is a proven and established method of inserting a new replacement pipe within an existing damaged pipe without needing to excavate.

The new drain lining is inserted into the damaged pipe by a method called inversion which uses either water or air pressure to fit it tightly within the wall of the existing damaged pipe. When the inversion process is complete the new pipe structure is completely rigid, producing a stronger, reinforced pipe fitted within the existing pipe resulting in a minimal loss of diameter of approximately 6%.

The drain liner is manufactured from a special dense impermeable felt and is designed and tailored to fit exactly the internal dimension of the pipe to be refubished. The thickness of the lining material can be varied according to design specifications required. We recommend the following products:

 

Drain Lining - Renoline Flexiliner

Renoline Flexiliner

FLEXILINER (For inversion and Drag-in drain lining)

  • Thinner outer coating for added flexibility

 

  • For use in any inversion machine, and can also be dragged-in

 

  • For use in bends up to 65° (inversion) or 90° (Drag-in)

 

  • Low Friction

 

  • Double heat-welded seam for added strength

 

  • For air-tight and water-tight applications

 

  • Fast resin absorption

 

 

 

Drain Lining - Renoline Proflex Liner

Renoline Proflex Liner

PROFLEX LINER (For inversion drain lining)

  • Stitched and welded seam

 

  • Extremely flexible

 

  • Good expansion quality

 

  • For use in bends up to 90°

 

  • Low Friction

 

  • For air-tight and water-tight applications

 

 



Patch Repairs On Defective Pipes & Drains


Posted on: December 16th, 2013

When it comes to patch repairs on faulty pipes and drains we recommend the Renopatch kit from Renoline which comes packaged in a small disposable box and includes everything you require to carry out a successful pipe patch repair. The kit includes plastic protective packer sleeves, two pairs of latex gloves, a resin spreader, elastic bands and wire cable ties, fibre glass matting, ready to pour resin and a ground sheet.

 

Renopatch pipe patch repair kit

Renopatch pipe patch repair kit

Cut flush the cable ties

Cut flush the cable ties

 

Before starting the patch repair ensure that the pipe has been surveyed and is clear of any debris and obstructions. When ready to apply the Renopatch patch repair kit locate the defect with a CCTV drain camera and make a note the distance in order to carry out the patch repair. The next step is to feed the protective sleeve over the packer and secure both ends with the cable ties provided in the Renopatch kit and with a pair of snips cut flush the cable ties.

 

 

 

Spread the resin over the matting

Spread the resin over the matting

Using a sharp knife make a small hole in each end of the protective sleeve in order to allow air to escape when the packer is being inflated. Next, lay out the protective ground sheet and open up the fibre glass matting making sure the shiny side is facing upwards. Open up the resin containers and pour the thinner resin into the ticker resin container then replace the top securely and shake the container with the resin mixture vigorously for 30 seconds. The resin is now activated so pour the resin solution over the fibre glass matting and spread evenly using the spreader provided to the edges of the matting. (Due the the cross axle design of the matting in the Renopatch kit you only need to resin out the shiny side saving time and avoiding mess).

 

Roll the packer onto the matting

Roll the packer onto the matting

 

When the resin is spread simply fold each side into the middle of the matting, then take the packer and place in the middle of the matting, roll the packer onto the matting making sure the matting is centralised – the elastic bands or wire included in the kit can be used to secure the ends.

 

 

 

 

 

patch is central and covering the defect

Patch is central and covering the defect

Slightly inflate the packer before inserting into the pipe, this will ensure any slackness is taken up, and connect the air hose into the packer and secure with the locking nut. Connect the rod to the packer and secure. Under the supervision of a drain camera insert the Renopatch into the pipe and push (or pull) the packer down to the pipe defect making sure that the patch is central and covering the defect.

 

 

 

 

Connect up the hoses to the compressor

Connect up the hoses to the compressor

Connect one end of the short air hose to the compressor and connect the other end of the short air hose to the regulator valve then connect the regulator to the long air hose which is already connected directly to the packer. Turn on the compressor and inflate to 2.5 bar. The regulator valve has a safety blow off release which means you can never over inflate the packer – on unstable pipework we would recommend inflating to a lower pressure.

 

 

 

Remove the packer

Remove the packer

Once the patch is cured simply twist the air release valve and deflate the packer and the packer should just slide out of the patch. Renoline supplies two different curing times for the Renopatch kit being half an hour and an hour and a half.

 

 

 

 

 

 

 

The following video shows step by step the process for applying a Renopatch patch repair.

 

We believe the Renopatch patch repair kit is the most user friendly pipe repair kit on the market and once you have tried it you will not want to use any other system. For more information and details of how to order please visit the Renoline website.

 

 



Why is a CCTV Drain Survey needed?


Posted on: December 16th, 2013

Drains, by their very nature of being underground, are subjected to a number of stresses over the years.  The ground can move dramatically, depending on how wet or dry it is, shrub or tree roots grow around the pipes and subsidence can also add high additional weight over the pipes. In order to check drains and pipes periodically a CCTV Drain Survey can be carried out.

 

CCTV Survey image showing damage to pipe

CCTV Survey image showing damage to pipe

Traditional Salt Glazed sewer pipes will start to breakdown after a while and these stresses can start to cause leaking at the joints, cracking along the pipes or at worst complete collapse. Leaky soil pipes are not only a potential health hazard but can also wash away the foundations of a property causing subsidence. Damaged pipes can cause blockages.

 

CCTV Drain Camera locates problem

CCTV Drain Camera locates problem

When buying a property, the mortgage lender will often want assurance that the pipes are in good order. How can this be done, without having to expose the pipes? A Close Circuit Television (CCTV) drain survey is ideal for this purpose. This is a totally non-invasive process in which we insert a ‘rod’ with a camera attached at one end, connected to a monitor and recording system at the other end. If a problem is detected, an on-screen meter counter can determine the exact position.

 

If a drain repair or patch to the pipe is necessary, there are a number of options available, including replacing the broken section by excavation, or alternatively and in most cases preferable by no-dig or trenchless technology which involves relining the drain or pipe from within with a Glass reinforced plastic. This is particularly useful where pipes are inaccessible, such as under buildings. 

Pipe Repair is carried out after CCTV Drain Survey

Pipe Repair is carried out after CCTV Drain Survey

 

 

 

 

After a drain repair has been carried out a further CCTV drain survey will need to be carried out check to make sure that water is free flowing without any restrictions.

 

 

 

 

 

 

 

 

CCTV Camera used to check pipe repair

CCTV Camera used to check pipe repair

 

 

 

 



Getting A Drain Survey – What Is Involved?


Posted on: December 11th, 2013

DRAINS! We don’t tend to think of them. It’s the place where your waste goes and we don’t want to know about that, as long as it gets where it’s got to go. The thing is (when there is a problem), like anything, the earlier you spot it the better. Since I started Hire at Scanprobe I always get asked the same question:-  I need to survey my drains, which drain camera would you recommend? And I always ask, is it for insurance purposes? The reason I ask this question is to do with the quality of drain survey you require. If you just wanted to check to see if there’s something obstructing the water flow, you can simply use our look-see supercam. This camera is a basic unit you can just pop down the pipe to quickly identify any major issues. Whereas for insurance purposes or for the sale/purchase of a house you will require more information.

 

The reason it’s a good idea to have a drain survey done is probably obvious, but it can tell you much more about the property than most realize. It can discover hidden man holes, which in some cases are inside the property especially if it’s had an extension. ItScanprobe Series 6 Drain Camera tells you where each pipe goes, what they are for and whether you will come across them if you’re fitting in foundations for a new extension. By looking for offset joints or cracks a drain survey can tell you if there’s been any subsidence to the property over the years and whether it’s still occurring. You can check for root ingress from nearby trees. Whether your pipes are running through to the neighbor or to the main sewer or even a cesspit. These are things I would definitely want to know before I purchased a property. Now using a look-see unit will tell you most of these things but the Scanprobe Series 6 is the unit 90% of people would use. The reason for this is down to the quality of the system. For instance:- the drain camera on the Scanprobe Series 6 is self levelling, which means the camera stays the right way up in the pipe giving you a much easier time determining where each branch enters. Also by knowing which is top and bottom you can determine whether an obstruction will effect the flow, as sometimes when the pipes are fitted, some of the adhesive can seep into the pipe causing obstruction, but if this is on the top of the pipe and not too big you could (in theory) leave it as it won’t effect the flow.

 

To survey pipes larger then 150mm I would recommend getting a company in to do it. Mainly because the cameras required, are a lot more complicated (our company can assist you on this). But for a domestic property, I don’t see why any competent person couldn’t hire our equipment and do it themselves.

 

Darren

Scanprobe Hire Dept. Tel. 0203 253 2001

 



Scanprobe Techniques Limited | Registered in England No. 02682996
Registered office: 99-105 Stanstead Road, London SE23 1HH

Wesite Design by STR Design & Print