Change proposed Graf One2Clean to Tricel Novo?

[flanagaj]

So our application has been spec'd with a Graf One2Clean.  On reflection, I would like to potentially switch this to a Tricel Novo, for the simple reason that the required excavation depth is considerably less than the Graf.    The Tricel does look like a quality offering as well, and I like the fact that you can house the compressor inside the lid of the tank.

I suppose that I would potentially have to have the calculations redone and the nitrate offset credits might need to be recalculated?  Has anyone change their tank from the one spec'd in their planning application? 

[nod]

There’s nothing really to stop you 

BC are there to make sure your tanks is installed to regulations 

and planners There interest went once your plans where passed 

Basically As long as it works 

I’ve installed three Treatment Plants now I’d avoid having anything in the tank other than shit A separate box for the compressor is much easier to maintain and less likely to fail 

[Nickfromwales]

Manufacturers installation guidelines also trump your BCO, so if you have followed them then they can FO 👌

[Jenki]

3 hours ago, flanagaj said:

The Tricel does look like a quality offering as well, and I like the fact that you can house the compressor inside the lid of the tank.

I'm happy with my Tricel, no other comparisons though. However the only thing I would (will) when I get around to it, change is the compressor on the lid. We're rural and at night it can be audibly intrusive. 😔. It will be moved to a concrete pad with zero resonance.

[flanagaj]

Just now, Jenki said:

I'm happy with my Tricel, no other comparisons though. However the only thing I would (will) when I get around to it, change is the compressor on the lid. We're rural and at night it can be audibly intrusive. 😔. It will be moved to a concrete pad with zero resonance.

Thanks for that.  I was just reading about the audibility related issue. 

[Jenki]

2 minutes ago, flanagaj said:

Thanks for that.  I was just reading about the audibility related issue. 

It's straightforward to move, if I knew, I would have created a pad at the same time I back filled with concrete, it would have been an hour or so works at the time. Plan for it and I would 100% recommend. No issue in 3 years so far.

[crooksey]

Personally I would stick with Graf. Nothing in the tank to fail, spares readily available and top class support from Graf.

 

[flanagaj]

On 12/05/2025 at 08:45, crooksey said:

Personally I would stick with Graf. Nothing in the tank to fail, spares readily available and top class support from Graf.

 

The issue with the Graf, is the depth of the install.  I am really liking the sound of the Rewatec Solido Smart.  This is apparently super quiet and a shallow install.  Only annoying problem.  Our planning condition states we have to install the Graf One2Clean.  Given the Graf has Ntot of 7.9mg/l and the Solido is 10mg/l, I'm sure any change will require me to shell out more ££ on their Nitrate mitigation taxes.

[Kelvin]

The ability to remotely house the blower unit in the Graf is great but  the blower unit is effectively silent. What does make a noise is the bubbling of the water when it exits the tank into the drainage field which you can hear through the SVP. But it does require a bloody big hole. 

Edited June 28 by Kelvin

[saveasteading]

4 hours ago, flanagaj said:

planning condition states we have to install the Graf One2Clean. 

Does it not say " or similar". 

Perhaps your application stated this model and the planners are simply repeating it.

They cannot make you use a particular model if another can be shown to work as well and meetscrequired standards, so get looking at the other options.

 

3 hours ago, Kelvin said:

bubbling of the water when it exits the tank into the drainage field

I'm surprised. Water in equals water out in quantity and rate, doesn't it?

I'm puzzled at why it should bubble noisily.

 

[Kelvin]

7 hours ago, saveasteading said:

.

 

I'm surprised. Water in equals water out in quantity and rate, doesn't it?

I'm puzzled at why it should bubble noisily.

 

It sounds a bit like when a washing machine empties and the noise you can hear at the sink. 

[dpmiller]

I think the Graf is like the Solido, with a pumped discharge using an airlift?

 

@flanagaj I believe there's now a version of Solido with Nitrate reduction using a dosing system- have you seen it?

[flanagaj]

9 hours ago, saveasteading said:

Does it not say " or similar". 

Perhaps your application stated this model and the planners are simply repeating it.

They cannot make you use a particular model if another can be shown to work as well and meetscrequired standards, so get looking at the other options.

 

I'm surprised. Water in equals water out in quantity and rate, doesn't it?

I'm puzzled at why it should bubble noisily.

 

But we had to purchase Nitrate Mitigation credits.  Said credits were calculated using Graf's certified value of 7.9mg/l and the Solido was 10mg/l

 

 

1 hour ago, dpmiller said:

@flanagaj I believe there's now a version of Solido with Nitrate reduction using a dosing system- have you seen it?

No.  But I will have a look.  Thanks