<p>Further to our site visit today at the above, we identified there are isolation valves for both CW and LPHW on 1st floor outside the lift lobby and corridor. We are unsure why you requested to isolate from 16th Floor, there is no reason as we see it to do the works this way. If we isolated from 16th Floor, the works on site would be approx. 4-5 days, all fan coils in each floor could potentially need bleeding of air following re-filling of system and the costs would escalate. You may be aware of another reason why this floor cannot be isolated this way, please advise if anything different and we can amend our prices.</p><p>We have pleasure in providing you the information requested as follows :</p><p>&middot; Isolate the CW and LPHW pipework serving the 1st floor only.</p><p>&middot; Drain down the CW and LPHW pipework service the 1st floor.</p><p>&middot; Cut and disconnect the pipework as it connects onto the isolation valve and fit blanking caps to ensure the valve does not pass</p><p>&middot; We have not allowed to remove any of the existing fan coils or pipework from the 1st floor.</p><p>Pressure Relief Valve</p><p>&middot; Identify what the PRV is currently serving to ensure that this can be isolated during normal hours.</p><p>&middot; Isolate pipework and remove the faulty PRV</p><p>&middot; Replace with new and modify pipework as necessary</p><p>Ventilation Duct</p><p>&middot; Identify location of existing duct to be removed and capped off.</p><p>&middot; The duct will be cut and an end cap manufactured to suit the existing ductwork size and sealed.</p><p>We anticipate the works to be completed with 1 day however we are unable to confirm timings. Please book into site the following if you wish to proceed</p><p><strong>Our cost for the works will be &pound;2,854.10 plus VAT&nbsp;</strong></p><p>Our total cost to carry out the above works in / out of normal working hours shall be</p>