Can you fit any pressure reducing valve/ multiblock on unvented.

[Millsy 82]

Assuming the pressures are the same can I fit a standard pressure reducing valve/ multiblock or do I have to fit manufacturers specific?

At the moment i have a grant duowave with a megaflo multiblock but the block is leaking the grant one I can get in a couple of days but I can get a standard one tomorrow. (caleffi one like the ones you get with cheaper unvented)

 

[Welder]

You can fit any components that perform as per the original BBA spec when out of warranty. Basically, simply replicate pressures & flows of originals.

 

[Riley]

Fair enough I was always taught like for like from manufacturer

 

[Welder]

Fair enough I was always taught like for like from manufacturer

That what manus want you to do. Look at the margins they make on spares and you'll understand why

When a product goes through BBA or similar approval, NO manu would limit their options by specifying ONLY on supplier of components. It just doesn't make economic sense. So, approval consists of 'performance' being approved. It is then up to the manu whose they fit. It's for this reason that you see changes during a product's life (so different components) but the same original approval number.

Hope that clarifies.

 

[Riley]

Totally get where you’re coming from Dave it’s what I was taught at college rather than any specific manu. I just don’t want to give anyone any wriggle room on 25 guarantees for using the wrong block or something

 

[mfgs]

As above, seek advice from the manufacturers. The reality is, anyone of the same spec would work. The world today though, where everyone tries to point the finger of blame. I would go 100% by the book and cover yourself.

 

[ShaunCorbs]

yes you can aslong as there the same spec eg 3.5 bar

you can upp the pressure but you will have to check the max working pressure of the cylinder and upgrade the temp and pressures blow offs etc

now if the cylinder is in warranty you must use manufacture parts else you risk if anything goes wrong not having any warranty

 

[Riley]

But my point here as said before is some cylinders are 25 years on the cylinder but range between 2-5 for components. Is it worth the risk

 

[ShaunCorbs]

But my point here as said before is some cylinders are 25 years on the cylinder but range between 2-5 for components. Is it worth the risk

Depends if the customer wants to keep the warranty

Yes fit manufacturers parts

No fit your own approved parts

 

[Ben-gee]

Even the manufacturers change the spec during that 25 years eg megaflo now uses that three part RWC set instead of the “original”.

If it came to it I’m sure an expert witness would uphold an identical spec from a different manufacturer, but I’m just ‘down the pub’ talking.

 

[Scott_D]

Would any manufacturer honour a 25 year warranty?
I think at best they might offer a replacement cylinder with no fitting

 

[Riley]

Well that’s still better than nowt

 

[Scott_D]

Well that’s still better than nowt

who pays for fitting?

 

[Riley]

All I’m saying is I bet manus would try and wriggle out of even that if a mismatch of components has been used

 

[Scott_D]

All I’m saying is I bet manus would try and wriggle out of even that if a mismatch of components has been used

Agreed, annual services etc

 

[Harvest Fields]

Even the manufacturers change the spec during that 25 years eg megaflo now uses that three part RWC set instead of the “original”.

If it came to it I’m sure an expert witness would uphold an identical spec from a different manufacturer, but I’m just ‘down the pub’ talking.

But it is still the one that the manufacturer has had produced specifically

 

[Harvest Fields]

Would any manufacturer honour a 25 year warranty?
I think at best they might offer a replacement cylinder with no fitting

Isn’t that what they do anyway?

 

[Harvest Fields]

who pays for fitting?

Customer. The manufacturer doesn’t have to cover fitting. (As far as I am aware)

 

[ShaunCorbs]

Customer. The manufacturer doesn’t have to cover fitting. (As far as I am aware)

thats why if you supply goods you have to cover (eg mark up / profit) as you could be going back later on within reason

 

[Harvest Fields]

Try explaining that to people though.

 

[Ben-gee]

Isn’t a 3bar RWC pressure reducing valve just a stock item? Likewise the other bits.

 

[Welder]

But it is still the one that the manufacturer has had produced specifically

No manu does thay Wayne. ALL use off the shelf components. Its simply too expensive otherwise

 

[Harvest Fields]

No manu does thay Wayne. ALL use off the shelf components. Its simply too expensive otherwise

Maybe. But the ones I fit come with the cylinder which means manufacturer approved in my eyes mate.

 

[Welder]

Maybe. But the ones I fit come with the cylinder which means manufacturer approved in my eyes mate.

Your job, your choice - always.

 

[townfanjon]

The manufacturers have to honour the guarantee’s but if the customer hasnt got evidence of services they have their get out clause then .

 

[townfanjon]

Maybe. But the ones I fit come with the cylinder which means manufacturer approved in my eyes mate.

Unvented associated parts change every few years an engineer would not know if the parts fitted were correct as to when they were actually fitted when new , take the Tribune for example I have seen them with it least 5 inlet control sets over the last 15 years .

 

[Harvest Fields]

Unvented associated parts change every few years an engineer would not know if the parts fitted were correct as to when they were actually fitted when new , take the Tribune for example I have seen them with it least 5 inlet control sets over the last 15 years .

Think I’m being miss understood mate. I’m not saying that they do not change. But when parts are needed I always take a pic of the data badge and send to my suppliers for the recommended part.

 

[Ben-gee]

On the subject(ish) wouldn’t it be a good idea to have a scheme a bit like MOT where a G3 registered guy/gal could go online to log annual services - this would aid in safety and warranty issues.

 

[Harvest Fields]

On the subject(ish) wouldn’t it be a good idea to have a scheme a bit like MOT where a G3 registered guy/gal could go online to log annual services - this would aid in safety and warranty issues.

I don’t like that idea

 

[Millsy 82]

The cylinder in question was a grant duowave cylinder with a megaflo multibloc no paperwork and they have literally just bought the house. So not really worried about a warranty as chances are it's not registered etc.

My theory was as long as it's the same spec as manufacturers spec then no problem.

 

[Ben-gee]

I can’t say I’ve really thought it through, more of a sudden thought whilst watching the golf.

 

[Harvest Fields]

The cylinder in question was a grant duowave cylinder with a megaflo multibloc no paperwork and they have literally just bought the house. So not really worried about a warranty as chances are it's not registered etc.

My theory was as long as it's the same spec as manufacturers spec then no problem.

Have you contacted the manufacturer yourself?

 

[Millsy 82]

Have you contacted the manufacturer yourself?

No. As long as it is to the same spec then what is the problem?

 

[Harvest Fields]

No. As long as it is to the same spec then what is the problem?

Unless you have the data sheet for the original and the new one, I guess we will never know.

 

[Millsy 82]

Unless you have the data sheet for the original and the new one, I guess we will never know.

Google grant duowave manual and it comes up with all the specs etc. Google caleffi 3/6 bar multibloc.