Frequently Asked Plumbing Questions - When considering any new fixture for your home, we recommend that you choose a fixture made by one of the major manufacturers. If cracks or fissures are present in the tank or bowl, this can impede the operation of the fixture. Poor mounting and deteriorating rings and seals can affect the operation as well. Keep in mind that many of the new toilets conform to new government standards that require they use no more than 1.6 gallons per flush. If you are replacing an older model, this may take getting use to.