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Someone please correct me if i am wrong but if you fit an AAV to the 22mm discharge from a Saniflo before it connects to the main soil stack, then surely you will have waste products being pumped out of the AAV???

I have to check my invoices with a well known nationwide merchant every month...Get over charged nearly every month anywhere between £50 and £500 although last month they really surpassed themselves by invoicing me for a 2000 litre bunded oil tank that I had not even ordered...

To the best of my knowledge I don't think Alpha do a CD30S...Sure it's not a CD20S?... I think the Alpha CD system boilers have a 3 year warranty...Did you check this when you called the Alpha Helpline?...

I must admit that I was a little surprised that the heat exchanger was replaced under warranty with no questions asked...Having said that, the sample that the engineer took from the system was honestly very very clean.

And something you correctly pointed out immediately after my original post Ben.

Engineer just said there was some debris in there causing the problem. Nothing else was touched.

Did I read that right?... Client got 8 quotes for this job?...

If your shower has an inlet strainer this may have become partially blocked. If you are thinking of upgrading your electric shower you need to consider the existing electrical feed too and the maximum output of shower it is capable of supplying.

Just a quick update for those of you who were kind enough to reply to my original post. I down rated the appliance to 30kw but this did not cure it. Worcester made a second visit yesterday (different engineer) and the heat exchanger was replaced...early days (it was an intermittent fault)...

Rads appear to be piped properly albeit in 10mm, not via a common manifold but each teeing into the heating circuit individually...Each rad was flushed seperately and the machine has a pair of magnets so I could see how the flush was going. Used 4 litres of X800.

Q1: did all rads get fully hot in that 7min span? A1: I was concentrating on timing the temp rise so I didn't check. Q2: did you gas rate the boiler? A2: 43kw net Q3: were all the lockshields wide open A3: no - some, not many, have been turned down. Q4: was he dhw side closed? A4: yes...

Evening bengasman...total output of rads is 29kw

The system is set up as follows: Grundfos 25/55, 22mm auto by-pass and then 3no. 22mm 2 port valves, one for the HW and the other two for the two 22mm heating circuits. Although there are two 22mm heating circuits they act as one zone and the two 22mm heating zone valves operate simultaneously...

Give Saniflo a call on 020 8842 0033...The technical dept are always really helpful.

Evening all...Bit long winded this, i'll be as brief as possible. Recently installed 40CDi on an existing powerflushed open vented system, 28mm boiler F&R to pump & controls approx 6m from boiler. On demand boiler fires briefly (2-3secs) before displaying a hydraulic fault symbol (opposite...

how much do you want to spend?...

If you know the manufacturer give their customer service dept a call...most will send out parts like that FOC. If you know the tap model before you call it will help.

Pretty sure that Heating World Grandee do a wall hung oil fired condensing combi...how good they are I don't know. I agree with holty...if you want a combi and you have the space then go for external.

Who moved the boiler for you?

Even though they can be a nightmare to contact, Salamander's technical helpline staff are usually very helpful...They might suggest fitting non return valves to the OUTLET side of the pump...I have done this for similar problems with a positive head shower pump but I am not sure if the same...