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laundry issues & overall water pressure

Hi, looking for assistance with a couple of things in property have just purchased: 1. Laundry sink - cold water only 2. Connection from washing machine to pipes slow leak, have replaced hose with new washers so think it is plumbing not machine related 3. water pressure is terrible, would like to explore options 4. long time for hot water to arrive, wasting water, would like to understand alternatives