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HT Lead (RS/RL Range)

Part number (MPN)
Z3003794
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Source
retailer parts list
checked 2026-11-06
Fitting notes

Work on gas appliances must be carried out by a Gas Safe registered engineer. Check the model and serial number on the boiler data plate. Source: a parts retailer's list, not the manufacturer's: confirm the part number on the data plate or with the manufacturer before ordering.

Compatible appliances

Always check the model and serial number on the data plate before ordering.

Frequently asked questions

Which appliances does Z3003794 fit?

The sources we checked list Z3003794 (HT Lead (RS/RL Range), Riello) for: Riello Gas 3/2 521M 3752105, Riello Gas 3/2 521T40 3752145, Riello Gas 4/2 522M 3752205, Riello Gas 4/2 522T40 3752245, Riello Press Gv 604T1, Riello Press GW 605T1 3473720, Riello Press GW 605T1 3473754, Riello Rl28/1 657M 3472003, Riello Rl28/1 657T1 3472013, Riello Rl28/1 657T1 3472015, Riello Rl28 652M 3473205, Riello Rl28 652M 3473207, Riello Rl28 652T1 3473215, Riello Rl28 652T1 3473217, Riello Rl28 652T1 3473220, Riello Rl28 652T1 3473222, Riello Rl28/M 663M 3471002, Riello Rl38 653M 3474105, Riello Rl38 653M 3474107, Riello Rl38 653M 3474305, Riello Rl38 653M 3474307, Riello Rl38 653T1 3474115, Riello Rl38 653T1 3474117, Riello Rl38 653T1 3474120, Riello Rl38 653T1 3474122, Riello Rl38 653T1 3474315, Riello Rl38 653T1 3474317, Riello Rl38 653T1 3474320, Riello Rl38 653T1 3474322, Riello Rl38/M 664M 3471402, Riello Rl50 654M 3474605, Riello Rl50 654M 3474607, Riello Rl50 654T1 3474515, Riello Rl50 654T1 3474617, Riello Rl50 654T1 3474620, Riello Rl50 654T1 3474622, Riello Rl50/M 665M 3471602, Riello Rs28/1 818M 3782005, Riello Rs28/1 818M 3782035, Riello Rs28/1 818T1 3782006, Riello Rs28/1 818T1 3782015, Riello Rs28/1 818T1 3782016, Riello Rs28 3783208, Riello Rs28 809M 3783205, Riello Rs28 809M 3783206, Riello Rs28 809M 3783207, Riello Rs28 809T1 3783215, Riello Rs28 809T1 3783216, Riello Rs28 809T1 3783217, Riello Rs28 809T1 3783218, Riello Rs38/1 819M 3782105, Riello Rs38/1 819M 3782106, Riello Rs38/1 819T1 3782115, Riello Rs38/1 819T1 3782116, Riello Rs38 810M 3784105, Riello Rs38 810M 3784106, Riello Rs38 810M 3784107, Riello Rs38 810M 3784108, Riello Rs38 810M 3784305, Riello Rs38 810M 3784306, Riello Rs38 810M 3784307, Riello Rs38 810M 3784308, Riello Rs38 810T1 3784115, Riello Rs38 810T1 3784116, Riello Rs38 810T1 3784117, Riello Rs38 810T1 3784118, Riello Rs38 810T1 3784315, Riello Rs38 810T1 3784316, Riello Rs38 810T1 3784317, Riello Rs38 810T1 3784318, Riello Rs50 811M 3784605, Riello Rs50 811M 3784606, Riello Rs50 811M 3784607, Riello Rs50 811M 3784608, Riello Rs50 811T1 3784615, Riello Rs50 811T1 3784616, Riello Rs50 811T1 3784617, Riello Rs50 811T1 3784618. Always check the model and serial number on the data plate before ordering.

Does Z3003794 have equivalent or superseded part numbers?

The sources we checked list no equivalents for Z3003794. Ask a Riello stockist to confirm.

What should I check before fitting Z3003794?

Work on gas appliances must be carried out by a Gas Safe registered engineer. Check the model and serial number on the boiler data plate. Source: a parts retailer's list, not the manufacturer's: confirm the part number on the data plate or with the manufacturer before ordering.

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Some lists are dated and the part may have been superseded. Information only, compatibility not guaranteed.