Pressure booster - dripping sound

[Mjward]

I have a Grundfos Home Booster 3.0 in my rental property. Was installed 3 years ago, I've never been at the house since it was installed and nothing was every reported to me by tenants so don't know if this has been the case since day 1 or an issue....

..but I hear a constant slow drip from within the unit. Nothing is leaking externally but sounds like after there is demand from the cold feed to fill the tank, the shut valve isnt forming a perfect seal and allowing drips from the cold feed to slowly enter. Is this something I should worry about or is there a simple fix?

I went to Grundfos or passed me off to their after sales technicians who in turn quoted £400+vat just to come out and take a look

Additionally it's a fairly noisy bugger when in operation but from quick Google this looks to be a common issue with mains boosters

 

[ShaunCorbs]

Ball valve sounds like it’s dripping / needs a new washer / valve

 

[Mjward]

Ball valve sounds like it’s dripping / needs a new washer / valve

Thanks Shaun. Do you think that's a generic part any decent plumber could source and for or is it something I'm best trying to order in first and hunt for a plumber with experience in these boosters?

 

[ShaunCorbs]

I would say special instructions should list some spare parts

 

[Mjward]

I would say special instructions should list some spare parts