Rácor de latón para bomba circuladora: tuerca, manguito roscado y junta

Brass union set for circulator pumps (2 units with gaskets)

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Regular price€7,50
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  • 4 in stock
  • Backordered, shipping soon

At Q-TECH, we apply the same clear rules for everyone: the law protects you, and when applied correctly, it protects us as well. By processing your purchase, you accept our General Terms and Conditions of Sale. If you are purchasing as a consumer (B2C), nothing stated herein limits the rights granted to you by mandatory law (RDL 1/2007, TRLGDCU): the 3-year legal warranty of conformity and the right of withdrawal under the terms and with the exceptions legally provided, which are detailed below. References to "B2B" apply only to businesses and professionals.

Your guarantees

  • Rights intact: 14 days of withdrawal from receipt for most products—subject to the legal exceptions you will see below, such as goods made to your specifications—and a 3-year legal warranty of conformity, under the terms of the TRLGDCU.
  • Conformity with the description: we guarantee that the equipment will correspond to the published technical description and what one could reasonably expect from it (arts. 115 et seq. TRLGDCU). Images and videos are for guidance only: the manufacturer may supply a more recent revision of the product or introduce minor aesthetic, packaging, or firmware changes, without this constituting a lack of conformity as long as the described characteristics and performance are maintained.
  • Traceability that also protects you: we document the condition, serial number, and seal of each piece of equipment upon shipment, and we video-record the opening of returns; this is your proof of the condition in which the goods were delivered.

Responsible use and your part

  • If you are thinking of returning it, keep it as you received it: without installing or activating it, with its seals, accessories, and packaging intact. This is how to ensure a full refund, without deductions.
  • Handling that exceeds inspection reduces value: handling the equipment beyond what is necessary to verify its nature and operation may result in a real, assessed, and case-by-case justified deduction (art. 108.2 TRLGDCU), never a fixed percentage. In particular: activating or registering the serial number, linking it to a manufacturer's account or app, circulating water through hydraulic equipment, unsealing probes, or installing software or consumables. Initial inspection of the product does not lead to a deduction.
  • The same item must be returned: withdrawal requires returning the supplied unit. Different equipment, or equipment with prior use, age, or wear prior to purchase, does not constitute a valid withdrawal.
  • Installation and cybersecurity, shared responsibility: this is technical hardware; you are responsible for correct installation, credentials, patches, and backups, while we deliver a compliant product. Q-TECH is not liable for damages resulting from poor installation, incorrect configuration, or omission of patches by the customer or third parties (in B2C, without prejudice to the legal warranty and liability for intent or negligence, arts. 86 and 130 TRLGDCU).
  • Delivery of bulky goods: delivery is made to the curb. B2C: transport risk is ours until physical delivery (art. 66 ter); we recommend noting visible damages on the delivery note and notifying us of breakages within 24-48 hours with photographs to activate the insurance. B2B: inspection and notation on the delivery note are mandatory; hidden damages must be reported within 24 hours (art. 366 CCom). Unjustified rejection or incorrect shipping information will entail the actual outbound and return costs (approx. €85-550 for heavy machinery).

Made to your measure (Advanced Pre-Assembly)

  • If your order includes equipment, racks, hydraulic assemblies, or technical rooms made or configured according to your specifications (permanent joints, custom cuts or wiring, parameterization, pressure testing), these are custom goods without the right of withdrawal from the conclusion of the contract (art. 103.c TRLGDCU; CJEU Case C-529/19), which is informed before purchasing and documented in the signed Order Note. A test you request without permanent modification retains your right of withdrawal, with only the actual loss of value caused by that test being deducted. Would you prefer to receive it tested, configured, and ready to connect, without assuming these risks? Contract our Advanced Pre-Assembly or the prior technical audit.

If you are purchasing as a business or professional (B2B)

  • The transaction is governed by the Commercial Code: firm sale, without the right of withdrawal; notification of defects within 4 days (apparent) / 30 days (hidden), arts. 336 and 342. Q-TECH acts as a distributor and excludes indirect damages, loss of profit, and data loss, limited to the price of the equipment, without prejudice to the manufacturer's commercial warranty.

Product warnings v1.0 · June 2026. Information summary; the complete and binding conditions are those published at q-tech.es.

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Set of two brass unions with gaskets to connect a threaded circulator pump

The brass union set connects a threaded circulator pump to the system pipework. It includes 2 unions with their gaskets, one for each pump port, rated PN 25. There are three sizes to match the pump thread: 1", 1½" or 2". At Q-Tech we use them when fitting or replacing circulators in pre-assembled plant rooms.

Summary

TypeSet of 2 brass unions with gaskets for circulator pumps
ReferenceSalvador Escoda AA25161, AA25163 and AA25164
UseConnecting threaded circulators in heating, cooling, solar and domestic hot water systems
Sizes1" × ½", 1½" × 1" and 2" × 1¼" (pump thread × pipe thread)
Nominal pressurePN 25
Included2 unions and their gaskets
Q-Tech installationPump fitted in a pre-assembled plant room or on site by an Expert Technician

What is a circulator union set?

Threaded circulators have a large male thread on each port (1", 1½" or 2"). Each union has a nut that screws onto the pump, a tail that screws onto the pipe and a flat gasket between them. The pump can then be removed without cutting pipe.

What problem does it solve?

DAB pumps and those of other brands do not come with unions. Without them the pump cannot be connected to the pipework, which is usually a smaller size than the port.

This set includes the two unions a pump needs, with gaskets, in the size that reduces the pump thread to the pipe thread. Being brass, it is also suitable for domestic hot water.

Sizes and compatibility

SizePump threadPipe threadDAB pumps in our storeSE reference
1" × ½"1"½"EVOSTA 2 and EVOSTA 2 SOL 130 mm with 1" thread (½")AA25161
1½" × 1"1½"1"EVOSTA 2, EVOSTA 3 and EVOSTA 2 SOL 130 and 180 mm; EVOPLUS Small and EVOPLUS Small SAN 180 mm; VS and EVOSTA 2 SAN 150 mm; ALM 200 and ALP 800AA25163
2" × 1¼"2"1¼"EVOSTA 2, EVOSTA 3 and EVOPLUS Small 180X; ALM 500 and ALP 2000AA25164

Compatibility and limits

  • Choose the size by the pump thread, not by the pipe.
  • Not for flanged pumps (EVOPLUS B, KLP, KLM): they need counter-flanges.
  • One set fits one pump (2 unions).

Frequently asked questions

How do I know which size I need?

Check the thread on your pump ports: 1", 1½" or 2". On our DAB pump listings it is shown as «Pump connection».

Can it be used for domestic hot water?

Yes. It is brass and suits bronze DHW pumps.

What is the delivery time?

It is in stock at our warehouse; if none were left, we would order it urgently and tell you the lead time.

Q-Tech installation and support

Q-Tech fits circulators with their unions in our pre-assembled plant room, which arrives tested and ready to connect. To replace a pump in your system, book an on-site Expert Technician by the hour; if you are unsure of the size, request a technical call. Pumps in DAB circulator pumps.

Availability and lead times: this item is in stock at our warehouse. Occasionally, depending on the time of year, the stock update may contain an error. If no units are available when you place your order, we will order it urgently and inform you immediately of the updated delivery time.

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