Problem of leakage with a new Grohe bathroom fauce

best talk with a plumbers supply retailer as they will know if it interchanges

probably a faulty washer in the tap
call a plumber to fix in not a handy person

Take off the screen on the faucet where the water comes out. It may be plugged. Most screens just screw off.

Change the gaskets.

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Popular Grohe 3427 Concetto Single Hole Bathroom Faucet - Chrome questions, problems & fixes. Find expert solutions to common issues, DIY guides, repair ...

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It's a complete cartridge that you need to replace. Contact Grohe and they should send you out a new cart. under their limited lifetime warranty

There is a set screw at the base i need to see the entire faucet to give specifics is it in bathroom or kitchen need to know if it is supposed to be in fixed position if so there is a set screw at the base

Any faucet sold in a "Faucet Shop" is junk. Any faucet that is made outside of the USA is junk (i.e; Grohe (European) is junk, but Grohe USA is fine. Why? Because real plumbing supply wholesale sells them and has replacement parts.
Not convinced yet? Then when your buying you expensive "decorator" faucet groups, ask the seller if they carry repair parts for everything they sell? You key to grabbing your debit card and hitting the exit door, is when the salesperson gives you a big-eyed stare of wonderment, at the question you just asked them. - Cardiff Plumbing & Leak Detection Co. 35-years of plumbing service and repair. Go fish.

Bathroom fittings and accessories is the ultimate destination where you can get best quality replacement handles for a Tuscany bath fauce.

I bought DANCO "universal faucet pull-out spray hose - fits all facuet brands" from Lowe's, which came with all kind of adapter and the hose quality seems to be better than overpriced Grohe spray hose replacement (Grohe part # 46092). The only problem is that you may have to prepare a large rubber washer in order to the handspray (Grohe part#46298) as I don't see this large washer in the package but it is very important to fit in place to prevent water leakage. - Michael