I am fitting a new grohe monobloc to my bathroom sink it has chrome 10mm pipes for hot and cold, trouble is i can only find flexible tap connectors that have 15mm compression one end and 10mm screwed the other to go into the monobloc itself, what i could really do with is 15mm to 10mm pushfit or 15mm to 10mm compression, i have checked and the chrome 10mm pipes don't appear to unscrew from the monobloc itself