Why Viton? As the water is quite cool nitrile would be fine.

Quantity and diameter required would be useful to know.

https://www.dejaydistribution.co.uk/balls14.html

Viton is a trade name, so in thus searching you are strictly restricting yourself to one and only one company’s products. Try using the more generic name:

Rubber And Viton Balls

https://theppb.co.uk/rubber-balls/

On 21 March 2024 at 18:26 Acrosticus Said:

Bulk suppliers generally don’t want to know!

Buy from an industrial supplier and flog the balance to Polly to help them re-stock.

I just looked at Polly’s site to guess at a size and for me, their website is showing stock, but it could be incorrect.

I have looked for some more Viton balls in the small sizes, but I think Polly was the only previous UK supplier.

Nitrile rubber balls are widely available but they do harden over time in steam. Viton o-rings are readily available on eBay but Viton balls only seem common in the USA and in large quantities.

The problem for a supplier, who might buy a quantity and re-package for the hobby market, is that most buyers are unaware of the performance difference between Viton and Nitrile and the Viton are more expensive.

I am now routinely replacing the Nitrile balls if I have reason to take a check valve apart.

Grainger will send to the UK, about £25 postage which if you need several sizes may not be as bad as if you were just buying a single pack.