Whether you need a pump or not depends on the current pressure you have within your property and in your bathroom. The optimum range of BAR pressure we recommend is 2.5 – 3.4 so if you are going to fall short of this then we recommend looking into a pump. We do not sell pumps so you will need to seek advice on which pump will be most appropriate for your house and boiler setup. A local plumber will be able to point you in the right direction and can tailor their advice to your requirements and specifications.