<p>Upon the attendance of our plumber at the above stated job, we have identified the parts that require replacement to repair the commander unit. However given the extent of works require to replace the part and the extensive maintenance carried out in the past we propose to supply&nbsp;a replacement commander box and sink mounted zip tap. Therefore we propose the following:</p><p>To supply updated model commander box and zip tap (Model no: BC160/125) and dispose of existing:</p><p>Our total cost to carry out the above works in&nbsp;of normal working hours shall be: &pound;4,632.00&nbsp;</p><p>Please see breakdown below:&nbsp;</p><p>Materials: &pound;4,290.00</p><p>Labour: &pound;342.00</p>