The DU144 automatic bypass valve controls water flow in the heating circuit according to the water pressure across it and is used to maintain a minimum flow rate through the boiler and to limit circulation pressure when other water paths are closed. A bypass circuit must be installed if the Boiler manufacturer requires one, or specifies that a minimum flow rate has to be maintained whilst the Boiler is firing. The use of automatic bypass valves becomes particularly important when heating systems include large numbers of thermostatic radiator valves (TRVs) – whilst the TRVs are open the automatic bypass valve remains closed, however, as the TRVs start to close, the automatic bypass valve starts to open maintaining the required water flow through the boiler. Using an automatic bypass valve is also likely to reduce noise in systems caused by excess water velocities. Because manual or fixed position valves do not regulate the flow and allow water to bypass even when it is not necessary, building regulations require bypass circuits to use automatic bypass valves and not fixed position valves. Features • Rugged design • Knurled handwheel for ease of grip • Hi-visibility markings on bonnet for low light conditions • Protection cap to limit user access to settings • Settable differential pressure from 0.1 to 0.6 bar • Factory set to 0.2 bar • Supplied with compression fittings for 22mm copper pipe • Spanner flats to assist with tightening of fittings • High flow rate capacity, up to 1.5m³ per hour
Standard orders under £50 plus vat will incur a postage and packaging charge of £6 plus VAT for delivery within our UK Mainland delivery areas.
We offer a free delivery service on most orders over £50.00 plus vat* (Monday to Friday)
*Further delivery charges may apply for standard parcels being delivered to remote locations and offshore islands, these locations include/but are not restricted to UK Highlands and Islands, UK Non Mainland, Isle of Wight and Northern Ireland. Please refer to the checkout page for a list of affected postcodes.
JTM Plumbing is happy to offer a next working day delivery service for all parcels being sent providing the items are in stock. 95% of our parcels which are ordered by 3pm are dispatched via Courier for delivery the following working day. Certain outlying areas may take longer to arrive due to courier restrictions/timescales.
Please call for prices regarding Long length to remote UK and all international orders prior to placing your order so we can advise on excess charges.
As we use 3rd party delivery agents JTM Plumbing we cannot guarantee that all deliveries will be the next working day. JTM will not be liable for any loss of income, loss of profits, loss of markets, loss of reputation, loss of customers, loss of use, loss of an opportunity even if we had knowledge that such damages or loss might arise or for any indirect, incidental, special or consequential damages or loss howsoever arising.
If you need any more information regarding stock, postal charges, dispatch time or timed delivery options and cost please call us directly on 01325 488588 or email firstname.lastname@example.org
Your Right of Cancellation
You have the right to cancel the contract at any time up to 14 days after you receive the goods under the Consumer Contracts Regulations. Please note that this policy has some limitations which are detailed below and does not apply to business customers.
To exercise your right of cancellation you must give written notice to JTM Plumbing either via hand, post or email. Notification by telephone is not sufficient.
Except in the case of faulty or misdescribed goods, if you exercise your right of cancellation after the goods have been delivered to you, you will be responsible for returning the goods to JTM Plumbing at your own cost. The goods must be returned to the address as shown on the returns form. You must take reasonable care to ensure the goods are not damaged or the box defaced in any way in the meantime or whilst in transit. In the case of faulty or misdescribed goods JTM Plumbing shall, after receiving notification, either collect the goods from you or ask you to return the goods at an agreed cost which JTM Plumbing will pay for.
Once you have notified JTM Plumbing that you are cancelling the contract, JTM Plumbing will refund or re-credit you within 30 days for any sum that has been paid by you or debited from your credit card for the goods. If you have paid for excess postage charges for special deliveries these will not be refunded only our standard delivery cost if this was paid as an addition.
Except in the case of faulty or misdescribed goods, if you do not return the goods as required, JTM Plumbing may charge you a sum not exceeding the direct costs of recovering the goods.
You do not have the right to cancel the contract if the order is for consumable goods which, by their nature, cannot be returned, save where a fault is discovered which could not have been discovered otherwise than by unsealing the goods.
If you are due a delivery you no longer require, but the goods are already with our courier and you refuse the delivery, a deduction of £6.00 will be made from your overall refund once the item is back with JTM Plumbing. This is due to our couriers charging a refusal charge.
We know that you will be pleased with your purchases from JTM Plumbing. However, there may be occasions when you will need to return items to us.
In all instances of a return, please contact us first. You must receive a "Return Order Number"
Items Damaged in Transit
If any standard items were damaged in transit, we ask that you report it to us within 7 working days (please note that this is 48 hours for our business customers). If the items are visibly damaged on receipt, simply refuse the delivery. Items should be returned in their original packaging complete with all accessories and documentation. Once received back into our warehouse, we'll issue a replacement or full refund to you via your original payment method and reimburse your reasonable return carriage costs.
Items Faulty on Arrival
If your items are faulty on arrival, you have 28 calendar days in which to inform us of the fault (please note that for our business customers, this is 14 calendar days). Items should be returned in their original packaging complete with all accessories and documentation. Once we have verified the fault, we'll issue a replacement or full refund to you via your original payment method and reimburse your reasonable return carriage costs. We test returned items, and if a returned item is found not to be faulty by our technicians we will return the item to you, in this instance you will be liable for the return carriage.
Items Faulty in Warranty Period
If any of your purchases develop a fault, and it's more than 28 calendar days since receipt, then provided your item is within its warranty period, you are entitled to a warranty repair. In some cases, manufacturers provide a specialist full on-site service and/or telephone help facilities for your convenience which we recommend you use in order to correct the fault quickly. For business customers all warranty repairs after 28 days of receipt are referred directly to the manufacturer (unless otherwise stated)
If you Change your Mind
If you have simply changed your mind about any item ordered and you wish to return it, then in line with the Consumer Contracts Regulations you can do so provided you inform us of your decision within 14 days of receipt. The item must not be used and must be 'as new' when returned to us. Once you've informed us that you wish to return goods under the Consumer Contracts Regulations, you have a further 14 calendar days from the point of advising JTM to do so, at your own expense from the point of delivery. Once the item is received at JTM Plumbing, we'll issue a full refund for the product to your original payment method. Please note this policy has some limitations and does not apply to business customers(an example of which is items which are made to order). If you paid a standard delivery charge (for orders under £50) then this will also be refunded however we would not refund any non standard charges that you may have requested (e.g Timed deliveries)
If you wish to return any items outside of the standard Consumer Contracts Regulations then please contact JTM for details. Outside of this timescale we may have restocking charges that would be applied. Standard postage charges would not be refunded at this point.
JTM Plumbing Ltd
Unit 1 Hannah Court Business Park
Contact us for our Payment & Security policy
|Product Information||Model||1+||Quantity Qty|
|DU144A1001||£41.00 Ex. VAT||