Drain survey on property I'm buying...

Nmq880405

Hi, wondering if anyone can give any thoughts please on the contents of a drainage survey I've had done on a property I am buying. 

I initially had a homebuyer's survey done which was pretty good, bar the mention of 'waste accuumulation' and the recommendation of a CCTV drain survey, which I went ahead with. 

The survey has come back with the following and I am going to negotiate with the seller, however I know very little about drainage and am wondering if, like with a homebuyers survey, some of these would be 'nice to haves'. I have spoken to the company but clearly they stand to make just under £3000 on this so have told me I should definitely get it all done. He advised one of the tests wasn't able to be done due to concrete and would need to be excavated and further CCTV. 

Any thoughts at all please from anyone who might know a bit more about drains? And does this price seem reasonable? 

I'm not sure whether i need to include most of the below but it doesn't mean much to me... 

Run A1025 
Run Start: MH1 
Invert Depth: 0.6m 
Run Finish: HOL
Direction: Upstream
Pipe Diameter: 100mm
Pipe Material: Clay
Run is Shared: ?
Water Pressure Test Result: No 
CCTV Survey Result: 0.00m start of survey, circumfrential crack (CC) 12 to 12 in manhole, 1.48m junction 3 o'clock, 2.12m junction 9 o'clock, 2.35m large displaced joint (JDL), 2.99m JDM, line left, 12 to 12, longitudinal crack, end of survey
Drain Serviceability Grade: B 
Internal/ External Pipe: External 

Run B1030
Run Start: MH1 
Invert Depth: 0.6m 
Run Finish: Discharge 
Direction: Downstream 
Pipe Diameter: 100mm
Pipe Material: Clay
Run is Shared: ?
Water Pressure Test Result: No
CCTV Survey Result: 0.00m start of survey, 0.4m JDM, 0.15m junction 3 o'clock, 0.48m junction 3 o'clock, 0.57m CC 12 to 12, 1.30m JDM, 1.93m CC, 4.28 line right, 4.94m line right junction, 5.10m JDL unable to pass, 4.62m open join, JDM, end of survey
Drain Serviceability Grade: B 
Internal/ External Pipe: External 

Run C1042 
Run Start: SVP
Run Finish: Discharge 
Direction: Downstream 
Pipe Diameter: 100mm
Pipe Material: Clay
Run is Shared: ?
Water Pressure Test Result: No
CCTV Survey Result: 0.00m start of survey, 0.24m material change to cast, 0.63m material change to plastic, 1.4m rest bend, water level 5%, 1.23m line right, 2.19m material change to plastic, end of survey. 
Drain Serviceability Grade: A 
Internal/ External Pipe: External 

Run D1037 
Run Start: Yard Gully 
Run Finish: Discharge 
Direction: Downstream 
Pipe Diameter: 100mm
Pipe Material: Clay
Run is Shared: ?
Water Pressure Test Result: No
CCTV Survey Result: 0.00mm start of survey, unable to navigate, survey abandoned 

Run E1040
Run Start: RWG 
Run Finish: Discharge 
Direction: Downstream 
Pipe Diameter: 100mm
Pipe Material: Clay
Run is Shared: ?
Water Pressure Test Result: No
CCTV Survey Result: CCTV Survey Result: 0.00mm start of survey, unable to navigate, survey abandoned 

Cause of Damage 
Vehicle pressure/ age wear and tear 

Detail of damage:
Displaced joints and cracking in the pipework

Further Action:

Install new channel in MH1 and re-bench the manhole 
Excavate through concrete and replace RWG, CWG and Yard Gully, carry out a further CCTV survey
Install 3no patches downstream of MH and 3no patches upstream to cover defects 

Total estimate: £2250 plus VAT 


Thanks in advance 

Bookworm105

so there are 5 drains
- 2 (D & E) of which could not be surveyed at all for unexplained reason
- 1 (C) is good condition and needs no work
- 2 (A & B ) need work done to them

works comprise:
1.  rebuilding a manhole (inspection chamber) from bottom up
2. repairs in 6 places to buried pipework relating to A & B 

where split pipes are leaking it is reasonable to say they need to be made watertight (repair patch like on a bike puncture) 
whether the manhole chamber actually needs total rebuild is impossible to say from that info, but one glance at it in the flesh would confirm

is £2,700 a good price - no idea !

stuart45

I read it that it was the channel and benching in the manhole that needed doing, 3 gullys replaced and 6 lengths of the pipework patch lined. There'll be more on top when they look at all the drains. Drainage work isn't cheap although a lot of it is labour.  If you've got the old salt glazed pipes and the drains aren't running properly it's worth getting them fixed.

Nmq880405

Thank you. 
They did attach pictures, but they could be anything, I have no idea what I am looking at... I'm assuming the second
 may be the manhole they are referring to
 

stuart45

The manhole looks like it was put on the drain run later on, and not part of the original build. They've broken into the pipe and built a manhole around it. Probably because the drain was getting blocked up and needed a rodding point.
At least it's roddable now.