Marco will under take to replace, free of charge, any piece of equipment, or part thereof, which is found to be faulty in material of workmanship within 12 calendar months of the date of dispatch from our works (plumbed ONLY); fair wear or tear, misuse or damage caused by faulty installations by other contractors excepted. All goods subject to claims under this guarantee must be returned to us for inspection (unplumbed). We cannot accept liability if repairs, or attempted repairs, have been made to equipment prior to our inspection or for equipment/ parts damaged due to limescale build up. This guarantee is extended only to goods of our manufacture. Component parts which are incorporated into our products and which are not of our making are subject to guarantees of the manufacturers of those parts. Our liability is limited to the repair or replacement of goods and not to incidental damage or expense caused by the alleged defect.